Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29751957606d2ad…

MALICIOUS

PDF

89.4 KB Created: 2020-12-20 17:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 86f65c70e80dd57a46c462ea2a7cf860 SHA-1: 6a52b4f6897f60c8e82d52d4dbd7b50235fa1db9 SHA-256: a29751957606d2ad0407ac9c9686190f1dfa02e22f39c1351e176cac7e45cbbc
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, one of which is to a suspicious domain 'traffset.ru', suggests a phishing or content-farming attack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, potentially using embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=the+warrior+heir+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fb5b5653ce70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fd310a13936a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5fcf2879b9558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fa4ced6bd3ae.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/282393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fb8651c679c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8a94a133069.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://uploads.strikinglycdn.com/files/7f6f2a6b-10f4-4e56-9dcc-c07cbc4f3993/la_guerra_de_troia.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/38696906873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9faaea26-91aa-4054-843d-3059d39f21d0/48970055803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c59deaa-6d28-4268-91d8-bd8f9f589039/hands-on_machine_learning_with_scikit-learn_keras_and_tensorflow_free.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/93472728928.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/marvel_strike_force_mod_apk_unlimited_orbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53317ad-8484-403d-9770-c892c5a257ec/2867545103.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/72326082904.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 3600 bytes
SHA-256: b78750ccb8e49eadff22760e2ccb03922dd6f64f2ac0f6159faa0975e33a3465
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 4984 bytes
SHA-256: cccd307bf3c9e45bec7925fbe61431bdbbda90bd040fabceb875a7b2a9e5317e
font_02_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 14260 bytes
SHA-256: a587ddf52585e1640e8e7404962ea951522db0e8fedcffb7b1a58a24d36aefc2
font_03_sfnt_off000131d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D6 16364 bytes
SHA-256: 1130b274230f6c428f36ae97e01f9b50f80ba3292409a97a6e20edcf083403ac
font_04_sfnt_off000147cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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