Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af9450fc1a880a7…

MALICIOUS

PDF

65.0 KB Created: 2020-12-18 12:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 70d8d76a608e1212efd6ab137cb0c13a SHA-1: b18d19209e2ddae0e0a3b9a4a5eecb407db533f4 SHA-256: 1af9450fc1a880a76978e90c8e2e04c0eb19d55e6e0f70998ab4125c82560f31
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=torrent+proxy+list+india PDF link annotation
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/resujedefovalex.pdfIn PDF document text
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/4094383.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/3114131.pdfIn PDF document text
    • https://kifajiziwezu.weebly.com/uploads/1/3/2/7/132740821/vutuj.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/nufupu-waler.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/lepimebosuxomu_fukixusa_famosulizik_sukoruzikazil.pdfIn PDF document text
    • https://durozuxazoxete.weebly.com/uploads/1/3/4/6/134647509/jojazazoxav-loxexusabig-temike.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/buredivularab_dafawoladufamef_numavekajoxe.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/6978e.pdfIn PDF document text
    • https://tewazopeza.weebly.com/uploads/1/3/4/6/134697603/kasaparofavuzozol.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/delilofizad-sarir-zalazisuxoziba.pdfIn PDF document text
    • https://doxifivot.weebly.com/uploads/1/3/4/2/134235468/wiwewatabigeze.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/0c1f7acd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0fbb61c8c741314323605/t/5fc6f2f88f079636156cf4f9/1606873849753/pottery_barn_baby_blanket.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27D 5072 bytes
SHA-256: 19bed9d3e34d4a3912935e714abc824ce114d93f5a46dfb85779aaae32968209
font_01_sfnt_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 10524 bytes
SHA-256: a18f1b58da1a7feae492daed72ba195b39da6599ffc66ee750dca80d59f1bfc2

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