Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a36e4fc77247a8…

MALICIOUS

PDF

276.2 KB Created: 2021-06-30 01:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5b27a9779161889dd2bba64702863d47 SHA-1: 1643396600b94d3bd23503b7e377491f14bbe410 SHA-256: 09a36e4fc77247a8f1a6de7763f9217266ab78a1cd53e53afcd19e7e6e2bc370
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It employs a link farm and SEO redirector, specifically targeting users with an 'image lure' and 'urgency lure' to click through to a compromised WordPress site hosting a PDF payload. The primary attack pattern appears to be phishing, leveraging social engineering tactics to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9753

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/873100dbb5ea638693dd040de193c315/77160656832.pdf In PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/26394684281.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaca9ea23---21535078338.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/a3md1giu4fa6120t5ll2i12vls/moligizoxixuwigogivupev.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/50662362be8d75db6bcde7f70a368438/38080059518.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/66258967178.pdfIn PDF document text
    • http://pestcontroluttara.com/ck/upload/files/39071908611.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16071c88452ba1---68985403141.pdfIn PDF document text
    • http://sakem.org/userfiles/files/dorovepatuwezokoxetosipe.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/belekigokasojiwono.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803098415ab---nijubegusivutunotutol.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f09c859f5---foxevusixuwezetu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae452ccd61---rudalilujole.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a59143bc51---xubizuxuvaxodewewi.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/94441280338.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/40fe1aafb12145af9df251e1ee5c2ca2/15476590978.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/cc37d2527c9fd728f0e5c3fbb365041e/tagufepixapodivezaso.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/49825344919.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a51ef7f7---fevebawitarorebigor.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/62013144695.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-15/20210515132235529231.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/08c54a5d7d880d2af937e47f84f691e7/bujunovakalenuke.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb750b2bb5---7127031809.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6163fa1505be7df4df5b98271bd07dba/56915854340.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/50327313133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=xamarin+android+expandablelistview+examplePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ca9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CA9F 18084 bytes
SHA-256: ff8285388c0860b3cdd3ce00c21b573986bcce22943ab2fc867d04d3b7d65fa5
font_01_sfnt_off0003fa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA4E 10952 bytes
SHA-256: b68f685460061725280eeab6b90651ac3f779901c7b4ae0b1b32bb1a892aa6dd
font_02_sfnt_off00041364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41364 16308 bytes
SHA-256: f6a07acca55077d057ff5f64f2b2e4da26d138be67fff4972f69d6f21b7473fe
font_03_sfnt_off00042990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.