Malicious PDF — malware analysis report

Static analysis result for SHA-256 471a19348cc33ee9…

MALICIOUS

PDF

69.8 KB Created: 2020-11-12 21:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f8bd149c27c185cf4429efe400317fdb SHA-1: db98a1fca8bb81f859a8e4bfa42d68c8b41f1a15 SHA-256: 471a19348cc33ee9e42b3438cfb6d0a52bf3525218efd1a86594d88789548399
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO poisoning attempt. The presence of a 'download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafffe.ru/aws?utm_term=cigarette+box+template+design PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f9daeb287fdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fa35810333c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f952bb768328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f98a94f8891c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f9f003e0920e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/donake/11719272791.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/tv_live_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549d1150-aeae-48e3-8fd2-af6446153322/litovanaxutasezum.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/passive_voice_exercises_all_tenses_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/zojirushi_coffee_maker_cleaning_vinegar.pdfIn PDF document text
    • https://s3.amazonaws.com/pofumapetat/luxujebogejunugaji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 5300 bytes
SHA-256: 608696eb59f3a03a92ac92ef0765e723ab814ccfd82cc91d63f2a656ff6e2fd7
font_01_sfnt_off0000d8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E1 10768 bytes
SHA-256: fad576860b7f640a6960ad920d1bb7423f07fc962c30434eaa24f1fadbe4dd97
font_02_sfnt_off0000fcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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