Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2f74000437624f…

MALICIOUS

PDF

68.6 KB Created: 2021-02-01 08:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 403137a1e380091f9836bdeef4a15b57 SHA-1: fdef4d0dc5361e2d3cc02de02c6823f172215390 SHA-256: 6d2f74000437624fefe5c84d06567e036dfd0dfc476150a0a0c8b33b0fa9d01b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The embedded URLs likely lead to further stages of infection or phishing attempts.

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://bologen.ru/123?utm_term=oci+in+lieu+of+pio+uk PDF link annotation
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/979bc68bcce4b.pdfIn PDF document text
    • http://qrettalq.online/juwumagemusilufirugopsxdrq.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/45b0a7b2ebb047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_6015ac3bd8084.pdfIn PDF document text
    • https://pepizowa.weebly.com/uploads/1/3/2/7/132711999/zilakujoxezig.pdfIn PDF document text
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/zerategazoxe.pdfIn PDF document text
    • http://lishop.site/7191645861z6wiv.pdfIn PDF document text
    • https://ruxesewafemowur.weebly.com/uploads/1/3/4/7/134761388/8177057.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/e4337b167.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/jicYTia/natesetatirukujekupo.pdfIn PDF document text
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/268c52fb0536acd.pdfIn PDF document text
    • https://moxiwomalupul.weebly.com/uploads/1/3/4/5/134598527/01f9b5a.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/tanederefovodudojcl.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/mamukawaxatali/40512261916.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/besuxewobikodovokuwifur.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/dolphin_emulator_for_android_7._0.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/kalepamedaxuxenevepowu.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_off0000d037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 4616 bytes
SHA-256: 818b17851c9e8203f7bd2926d9072a4fbff4d416f3a563f5dc022cbcb825932c
font_01_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 11008 bytes
SHA-256: c5a3a3d446f75eccecd9d249d7a021a1d1c550da1c50bbf870cfe457f778810e

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