Malicious PDF — malware analysis report

Static analysis result for SHA-256 49dd136197aa41af…

MALICIOUS

PDF

65.0 KB Created: 2021-01-02 12:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 153f678bfd168355a9dbfd9b51de856a SHA-1: d32e2707f11487ccb887ddbb21536686c1700ce9 SHA-256: 49dd136197aa41af9a4bbe458a4a880996d3ae6ee13e13d5d7f14565645f09fc
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 SEO link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://traffnew.ru/123?utm_term=mens+white+linen+pants+drawstring PDF link annotation
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/e6880136530b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5fd2da0446560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f9a5578d5f46.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/Qgh47bv/private_download_apkpure_uptodown.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/4686988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/326ccf1a-0e2e-4e9d-a1cb-276541211877/kefebekajefitaledobepilug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b7dd4d-b248-438e-837a-b0d4e538ee8b/99529368535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2730f2-8a62-4f2b-9224-00d11bcdd5ed/69995100067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af850764-9f81-45c1-859b-dfb8a16af588/dayz_standalone_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfd0bde-53d6-475f-a6f4-f777f0859984/cuales_son_los_isp_que_ofrecen_servicios_convergentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d9ea99-0913-464a-bea8-ef445d0b1556/50816741571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2293ff63-a0c1-4e2b-a417-f0d184e45a83/puvikiwomemoxufodederev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b488b8c4-9bf4-447b-9d25-6995ec3248a5/cause_effect_reading_and_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8649ef-6e6f-430d-8cbd-54e558b4007c/units_for_hire_calne.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_off0000c22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22C 5316 bytes
SHA-256: f728e351a472924cd327066f182009dd62f57ad7972b3b2f8ee3606a9ec4ed65
font_01_sfnt_off0000d458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD458 10264 bytes
SHA-256: c979243e2a484a805c7b35bed2f69304098ea8764389f53366d7c37069647f93

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