Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ed1210467f21e2…

MALICIOUS

PDF

89.2 KB Created: 2020-12-17 06:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aa12b67a7a43d0afd7fc9336a29a5bc7 SHA-1: e2762dc97c6b875051866d6ac4908600add6c80f SHA-256: b3ed1210467f21e29005d759ac49e47736d61e7e232bf346de7f1a5fbb372ecb
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'traffset.ru', a known malicious domain. Heuristics indicate a link farm and a callback lure, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/123?utm_term=generator+powered+by+tractor PDF link annotation
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/lilonuxaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5faafbfe278d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5fd883568e4ea.pdfIn PDF document text
    • https://kusopexel.weebly.com/uploads/1/3/4/5/134526262/e0502e.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://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fc6948d61e25426e11e005e/1606849678046/kopiralanar.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/at_dev_english_to_bengali_dictionary_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/aetna_better_health_pa_provider_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61df53ca-3dc7-4a1f-a422-bc5cf848bda2/23696123084.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bamhi_fermentas.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/real_bike_racing_game_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03891af5bf52c3280d95/1606222730360/how_to_delete_ibotta_account.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/pebufuzaxoditakowobogorig.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 4960 bytes
SHA-256: 1eb130665463f7927b9bdcc9673b1d093e7b90b30d0332e99ad89852fef5c7f1
font_01_sfnt_off00010cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC9 11736 bytes
SHA-256: d198f1e02af9b14d6e14bd480754960ebe3c436af13dd19caf8a1f5bd6386c8e
font_02_sfnt_off000134bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BD 16108 bytes
SHA-256: 2906e013a2c12f8438753706de5a20d0a45d34478d649377d82f29cc76ae0543
font_03_sfnt_off00014969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14969 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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