Malicious PDF — malware analysis report

Static analysis result for SHA-256 990e66d4e2184934…

MALICIOUS

PDF

82.2 KB Created: 2021-03-02 03:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b3a14314c7667b5cc0bddee4aa7bfb1a SHA-1: 6bc46031e21b27b00e3a0cd772890e48de32a84a SHA-256: 990e66d4e2184934bc4d4efab7b4dbef5a15e5b05f9dfff8b3bd004bcb0eb465
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a prominent one related to car lease negotiation, suggesting a phishing or scam lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://mezovuduw.ru/award?keyword=can+you+negotiate+a+car+lease PDF link annotation
    • https://bobilomagavakux.weebly.com/uploads/1/3/4/8/134868487/morej.pdfIn PDF document text
    • http://tugrull.com/87713347685bewe4.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/2ec683be70c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fd3db4533b23.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/wukawefugugotebobak.pdfIn PDF document text
    • http://uplrezina.site/craftsman_8-amp_10-in_corded_electric_chainsaw_reviews36lme.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/rorixufamamoz.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/nafibanefexex/85852652794.pdfIn PDF document text
    • http://fanutebuxus.rf.gd/alchemy_meaning_in_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/42813399790.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/dearly_beloved_sheet_music_flute.pdfIn PDF document text
    • http://fuxufotab.epizy.com/consecutive_numbers_independent_practice_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/66505063043.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_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 4976 bytes
SHA-256: ee30d9a16d61f04bfbbe4a43bdd9eff55ff2176ce82020fc0a40ad4c50989c8e
font_01_sfnt_off000108e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E5 10796 bytes
SHA-256: c6eb75a684d0aab06a7ae1c131996fc013f5c52766c9f506524b9b0d9245d826
font_02_sfnt_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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