Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee096b383a9b81a…

MALICIOUS

PDF

70.7 KB Created: 2021-05-13 01:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9935b4e9530b3bf83d6d989f340104d1 SHA-1: 7b41598e02b7541cb72c99804e20ea4fb36c5cb1 SHA-256: 0ee096b383a9b81aceef00a5daccd95521adccb6e5a7f78936efb27cdf5b1e09
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or engage in phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, likely used as a lure to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=corian+fabrication+manual PDF link annotation
    • http://trynutra.shop/witefumagenuzutalixetepuviokdm.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/bijqhjA/lisubob.pdfIn PDF document text
    • http://prognoz-football.club/brother_l2701dw_printer_driverjb2sv.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/yWieoXi/71992301184.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/dhhjkhb/large_dog_bubble_coat.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/botibasulobebala.pdfIn PDF document text
    • https://mugezumaz.weebly.com/uploads/1/3/4/4/134401185/zerikowivexusipi.pdfIn PDF document text
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/bitosoveviwekat.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/FhjibiM/futerurigekajodaxagumoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/gogeguvakujetinib.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_7a91820f7e28436e978d5a6fb15f0a01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/golixebemakikenupegetimo.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/mabulike.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_719e36fce406443abd1526a993051570.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_8655a3114c824787b9d16fe24ba8a8cf.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_b21b2bb005c447bca1e962d2a69188d5.pdf?index=trueIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_2b34b3b572374c7aa1ae12fe58311b8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/72980174382.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_c091770789dd416a9857c4adb00cb65a.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_4a1162fb3254413d92324e6c0012f5cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/wubuxovopulofis.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD666 4896 bytes
SHA-256: 77868b71de995913f71fa525fbd1d1bd0e12db36b2d62e455106793ef04a3aac
font_01_sfnt_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 11368 bytes
SHA-256: b212330135b8e3f042f71a5d0519d09571f7ceb161e3e3775fef30af8c1668e0