Malicious PDF — malware analysis report

Static analysis result for SHA-256 896ec15ab286d234…

MALICIOUS

PDF

69.6 KB Created: 2021-02-21 15:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ae3d8cab63d99eb84a8e7c3ef6dd434d SHA-1: 9beea85882c6a0703c1a74e8ead114b4c845ba1d SHA-256: 896ec15ab286d234ed090ddc430a9257c52a1df7cad6122be301d0003eda189f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://baarspo.ru/123?utm_term=tear+violently+meaning', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=tear+violently+meaning PDF link annotation
    • https://cdn.sqhk.co/jelivapizivo/0jbhjoZ/numuruz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_601ce709d1925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fe9725188a9e.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/wirakamafemop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6029453eb03c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_601a3be9e9235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5ffa2d78a7c9e.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/bigwhgd/attack_the_light.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492580/normal_5ff4ca72e763c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6017df7b1dcfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5fcb1825ba0e3.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/geCucqt/celestial_bodies_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/zaoicep/78615759995.pdfIn PDF document text
    • https://cdn.sqhk.co/domuduxuro/jcjbfjf/20418871872.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/gdc1Ct3/48788335739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fc729b971624.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 4936 bytes
SHA-256: 6750eeb7bdb7ff696b583ab0b17f4f31c516c399765e3353e697bc8d230e605a
font_01_sfnt_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 11680 bytes
SHA-256: 5debe559f88005b98b886579e23d4c207f3d6f1127c9d20bef18c84af654ea9f

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