Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6812ceb6ca1f0c…

MALICIOUS

PDF

67.3 KB Created: 2021-06-04 04:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0967b028533544b26f20e531f91c8a SHA-1: b0cc7fb6eaea4fa63c4a3e348a48d62e250a346f SHA-256: 0d6812ceb6ca1f0c7f6c7200373e83f0542f6c1953b0f73e6b91444ca401b45c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/pbw?utm_term=dressmaker+ii+sewing+machine+instruction+manual
    • https://bejuzozomixur.weebly.com/uploads/1/3/5/9/135966319/jonifakanedova.pdf
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/bitem_xezulexa.pdf
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60269c2801f17.pdf
    • https://nusewuna.weebly.com/uploads/1/3/4/0/134096348/topaba-faminug-dotot.pdf
    • https://xonatiwomunonow.weebly.com/uploads/1/3/1/8/131856992/218d89.pdf
    • https://rixilokif.weebly.com/uploads/1/3/4/1/134109141/010223dce7.pdf
    • https://cdn-cms.f-static.net/uploads/4419452/normal_601aa21ff156a.pdf
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/1804571.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca3a8178-4d44-4610-b808-3c01c2a7bd5e/superficial_vein_thrombosis_treatment_uptodate.pdf
    • http://fuxedemama.pbworks.com/f/wakumune.pdf
    • https://uploads.strikinglycdn.com/files/4497032f-5540-4ae2-852e-c2536d41f20c/honda_transmission_fluid_change_mileage.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144417405/sexotawo.pdf
    • http://juwelite.pbworks.com/f/yardworks_lawn_mower_manual.pdf
    • https://uploads.strikinglycdn.com/files/145e81f8-6b17-468d-9cbc-7ad770348ab1/89508408252.pdf
    • https://uploads.strikinglycdn.com/files/b2dc94a0-cee6-4ea1-b0ab-24f95acc9da6/pagosifenonijejefo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ee.bin
73dfff16b5495cea41a78a7c7f284650fcf99fa80016ac0c12b390e420bc2ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EE 5368 bytes
font_01_sfnt_off0000db22.bin
d14f6ee55e91cb1c1ad479c7523b499c0079e50fca8fd9b230df515ebf4ded64
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 10248 bytes