Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccfefcc07de189d…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 21:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47896f7a2153ca34f3101cb08a3ed25a SHA-1: bd14bf6624847ab6d40180b27e3c18d13150ff01 SHA-256: 0ccfefcc07de189dde553d8ccc5450fd06f11f9a24b9e0e26ee549b25f3a061f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits multiple high-severity heuristics indicating malicious intent, including links to algorithmically-generated URLs hosted on compromised WordPress upload storage. The presence of a 'download button' lure further suggests a phishing or social engineering attack. The ML classifier and ClamAV detection strongly support its classification as malicious, likely a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://yongchengtech.com/uploads//files/202108051232581103.pdf In PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/779itgd89pdhv5d0dbe9cgb7f7/bikugulosivonogudime.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jbcfv7q9lcd7k8s387juphtkq2/fabonimuxigamevinuwox.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/17217806907.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/14223094845.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/57736113817.pdfIn PDF document text
    • http://enkepharma.com/upload/files/jekifigufoxeredunoxawemu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcd96a71ef---6968021908.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/vagosewadapemur.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/mudesisewodufus.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107604f9f66b---fusedejukuzeso.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b6cd44a47---tugidataratorugomimifoka.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/rurajasojamunebomalu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/c192e1d3d8b04ce832a899c8ed175422/26724570047.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075222aa2e6f---79532534256.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cm325ma8jfnsqn6hkfqf92ir51/xenixisasovabunak.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/168197a9d1acbc999fa0985a80f3c59d/dapafineja.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/dt4qnoivglctpltr4srkfqcrub/sodeluxe.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/dd968db79c3c7a073e34a2a7c8783c58/39637320265.pdfIn PDF document text
    • https://mfdesign.hu/files/file/wawizo.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/63052026576.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b83760000c6---95303327368.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cafff261b5---lofulutezelena.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b1df3d2bdb0---93874059484.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610db7ab81823---85902915920.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/54327302528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+monkey+king+3+hindi+dubbed+filmyzillaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 11076 bytes
SHA-256: d5bca6591d0fa90af4cdb801c05f63c2217bd73731c62608f8c9a029722cdbb3
font_02_sfnt_off00010992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 17364 bytes
SHA-256: ad223e78c471afebab4a33348ca869bbea30986aecfd898673fd8b4a8f6e55f3