Malicious PDF — malware analysis report

Static analysis result for SHA-256 7debe25d11dbb9b7…

MALICIOUS

PDF

67.0 KB Created: 2020-12-26 10:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 210135dde0cd1260bb04be716e40dc5e SHA-1: 90fb9c81ad874f8dfa6f76a2ee4820cb6c68b074 SHA-256: 7debe25d11dbb9b74e72e3cc3caa8966e50e76b9a95647fd2b2ee8f8badd271d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/strik?utm_term=block+battle+royale+battlegrounds+craft+3d+download PDF link annotation
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/ae78f6e23740.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/hgii00M/budweiser_logo_vector_free.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/2ab4ef43a27a.pdfIn PDF document text
    • https://xuboxale.weebly.com/uploads/1/3/1/4/131452808/lolelenamuzig.pdfIn PDF document text
    • https://bigorofepomibed.weebly.com/uploads/1/3/4/4/134400252/5226343.pdfIn PDF document text
    • https://tubefirijivu.weebly.com/uploads/1/3/4/3/134351006/2299546.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/widuxade/wanizulaxeruj.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/92048274770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151237e7-c9ee-46f2-8fe5-86c50676730b/72253773486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541caa05-7d8a-400b-ac14-73f02684da92/lilitawuvixolaziveginej.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/active_passive_voice_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/65720781790.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/65466189004.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_off0000c8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D5 5800 bytes
SHA-256: 3981ca13faef3b8142e167c2c83b4227516ac254927f256f8252b21e10a591c6
font_01_sfnt_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 9968 bytes
SHA-256: 38e12a585d2c2ce9f8e23cd29f41b9aee3cadb21ac415bf55e9eaac14d595093