Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccbaf3577d2342e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-27 00:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f1ef7576d6dcde1e6b9e12a41362a85f SHA-1: 609b784a9bf53586e50768143792169812c06334 SHA-256: bccbaf3577d2342ef9d4cffecc052198c5af7a34be0931c97dabefa6fac5f4a8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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 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.
  • 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 https://catamma.ru/uplcv?utm_term=andromeda+amharic+book+pdf+free+download PDF link annotation
    • http://eviljoy.com/UserFiles/File/52686927431.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/48927779253.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/92603347118.pdfIn PDF document text
    • https://tuinvandecruys.be/file/58853313301.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/jexawud.pdfIn PDF document text
    • http://nineslash.com/user_file/file/55578273981.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/kafosijasalelilibidex.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/fosewurada.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/78463271468.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bb72de570f7d4bc56ad8eabfa630078f/xelotodom.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/zapigodofugubuwobewi.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/52888284281.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/wuzajekabipow.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1614ceeef2267f---4380511914.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/libezimodafujil.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/14215434292.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce28749023---nasozada.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/30868863827.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/18965980850.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/26802065280.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/81350408252.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/vapinukuwizirej.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/48726219845.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vnmuekj8qda324gciri9nbt6l2/29505897559.pdfIn PDF document text
    • 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_off0000b15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15F 10916 bytes
SHA-256: c9b3d965447e110c0a4a97e295130c4acec78df7f07f753241da001fcbf8b12b
font_01_sfnt_off0000ca3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 15920 bytes
SHA-256: 3631a521a76a029876af8a720ce90cd8ba826cb3ad23b482c458c63e3b774aaa