Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3bee534a566d5d…

MALICIOUS

PDF

83.3 KB Created: 2021-06-01 18:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f0da0301cb11d0629b1e9556578db9aa SHA-1: 9939c3edd4da9a1e28cd3223b5c92a3ce74e4774 SHA-256: be3bee534a566d5dd6be8401f21d4e01f4374108d36b5528415be28ca15e4c31
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://baarspo.ru/123?utm_term=beyonce+meme+folding+fitted+sheet, which is likely the intended destination for users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=beyonce+meme+folding+fitted+sheet PDF link annotation
    • https://segunimumise.weebly.com/uploads/1/3/1/0/131070895/7289529.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/7162402.pdfIn PDF document text
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/digawejimum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144428925/does_tmobile_give_free_hotspot.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144439776/family_tree_printable.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/libros_de_harry_potter_originales_en_espaolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0192f61-8565-462f-abf4-564cc54d6b12/30894363082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4693a7e9-4e0e-445e-9187-99f93de6d303/59114970340.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144416433/famous_quotes_on_friendship_in_marathi.pdfIn PDF document text
    • http://pobonagul.pbworks.com/f/deep_learning_with_python_franois_chollet_2nd_edition.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144438402/puletumeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5380f1a8-6319-4f8b-bc58-494f949d6553/andrew_wommack_ministry_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae612d1-5f14-4baa-9b9c-fb42d3e85c30/kitchenaid_refrigerator_repair_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6c6f36-0633-44f7-bf24-46ba18be3502/zogixaviguwawuwole.pdfIn PDF document text
    • http://veweran.pbworks.com/f/80672665215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea3b210-caab-4924-860d-b9fa7021e46f/directv_wireless_genie_mini_4k.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/vajaminegadamanajat.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144417015/1962533707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d2626c-1c09-4455-946a-43e2cd2f1aea/giwele.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/fleischner_society_guidelines_for_pulmonary_nodules.pdfIn PDF document text
    • http://banusiv.pbworks.com/w/file/fetch/144446127/ragositepokerikusepun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 4216 bytes
SHA-256: 535c96e1334569f8895004614e21d31c9029b2c921c3e17dbffa0f1de19d133d
font_01_sfnt_off0000fe78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 5280 bytes
SHA-256: 1d68e66ce13851f384f378c14dd4299d5c369bdfaea90ea63b54193de25340e0
font_02_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 13912 bytes
SHA-256: 5de6c3d4455615b3e4dad11c8c5589c06f9527e862be7d61b3be55d274f311a0