Malicious PDF — malware analysis report

Static analysis result for SHA-256 453cf5395fa3e247…

MALICIOUS

PDF

68.3 KB Created: 2021-01-03 05:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: df5aada96292bc0fe4cc467e7ea0d0a4 SHA-1: d8ef056806e83bc01ba89a621a0d51c966f203a7 SHA-256: 453cf5395fa3e2473ab6c7d161e9586dea67595deb4b0032f792415b1165f6bf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary URL pointing to 'traffnew.ru' and another to a Weebly-hosted PDF, indicative of a link farm or phishing campaign. ClamAV and ML heuristics confirm its malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=wurth+pro+500+series+drawer+slides PDF link annotation
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/ludapavepexut.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/5584db8af.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/fnFMif2/62050497203.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hfPghgj/landline_service_providers_in_my_area.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/CUcJuhh/pokeball_plus_mew_level.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/e5af86e2-c4f1-4e7a-9b3e-eeb607a32c35/game_basara_ppsspp_cso_ukuran_kecil.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/1790871205.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/16259607037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d391eae-c167-4059-a1f4-a9e414cccf87/pneumonia_care_plan_nursing_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/thor_stormbreaker_images.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/2002570862.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/myopia_definition_concave.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/82266310624.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_off0000ce23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE23 5420 bytes
SHA-256: 02cb9c0a98685a29c23f403facc3023c2f69140f6b8e9335511af83d168cc9b9
font_01_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 10580 bytes
SHA-256: 41fe36eca5ed6c459dd0c5d6bfcdb5e121df54131c2fb5b8f114527cdfaaad41

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