Malicious PDF — malware analysis report

Static analysis result for SHA-256 297e4d641320c027…

MALICIOUS

PDF

74.7 KB Created: 2021-02-25 06:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 69c2bd2b72b96fc2bc4b0d7ac1d5fcd0 SHA-1: 2012e81f65752bfec27df68aba6fcdca1a436ad6 SHA-256: 297e4d641320c027ac33a0c9e736ee2cdc1f054255dc059afc2e913ec4e342dc
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document functions as a link farm, directing users to potentially malicious websites. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript for malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=deck+dragon+hearthstone+mage PDF link annotation
    • http://domavera.ru/8093396351oe66p.pdfIn PDF document text
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/6000842.pdfIn PDF document text
    • http://nawumamarupojo.22web.org/lumens_projector_guide.pdfIn PDF document text
    • https://rozutawupev.weebly.com/uploads/1/3/2/6/132695629/8edbd06b8e49.pdfIn PDF document text
    • http://fexekozupupuge.22web.org/grass_cutting_contract_template.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/98927639682.pdfIn PDF document text
    • http://xasusofeg.iblogger.org/zagoxodojirogivokufe.pdfIn PDF document text
    • http://realnoe-obshenie.online/dufifigedujumawieb2b4.pdfIn PDF document text
    • https://tunoworuv.weebly.com/uploads/1/3/4/0/134017870/9415113.pdfIn PDF document text
    • http://sarhello.online/43877419865c5erv.pdfIn PDF document text
    • https://dunegigamirusa.weebly.com/uploads/1/3/1/4/131437715/guwitaguzilabo_zetogoxaxiruzug_zulajowotexi.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/paropabaru/conveyor_guide_parts.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 5124 bytes
SHA-256: 9e32392696094f8f7f8fb6787caeab5bd44627edbd7ec1487b8082021ae01b9c
font_01_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 12732 bytes
SHA-256: 099c016c770a245b9eeadc5fc93a3f04a70c307f524dd6f5abd4f9f1194fc2c5
font_02_sfnt_off00010fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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