Malicious PDF — malware analysis report

Static analysis result for SHA-256 7242c3d01eef1610…

MALICIOUS

PDF

85.6 KB Created: 2021-04-03 14:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e6c32ca1901fb11cde1de061bc3e7775 SHA-1: c78330cc56c642643df097c84ecb456bd6aedf02 SHA-256: 7242c3d01eef1610b7dd233240d7fa6f534efb0fd933ea3e7692b01479836ba3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to harmful content. The ClamAV detection and ML classifier strongly indicate a phishing or trojan payload. Although no scripts were explicitly extracted, the presence of numerous external URLs and the PDF structure itself are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=elder+scrolls+online+sorcerer+solo+pve+build PDF link annotation
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/916202bdefc867.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/1088121.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/ikea_brusali_wardrobe_assembly_manual.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/asme_y14._5_2018f881u.pdfIn PDF document text
    • http://foyou.store/86901160184koos0.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/sinemodavogagu.pdfIn PDF document text
    • http://business-open.online/dawavubojenajezezoxifln5z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/casio_exilim_charger_walmart.pdfIn PDF document text
    • http://butaxogusevi.epizy.com/sinaripizagomit.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_db86ca9d62994275a7b2ec8e65f688fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/tirarosizufopuzafonuxuda.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_7d3246caf9f0487fa602cd2be81bc33a.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_f548e8bdf79847cebdb8f9261dd069cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/32903761515.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/2881846263.pdfIn PDF document text
    • http://wowadepadon.rf.gd/1306818189.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_1fd89ced80564e5ea8bd94b91fe1725f.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_1beaee10d435442cb8161dcfc45396d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/scatter_graphs_corbett_maths_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D2 5016 bytes
SHA-256: 330d369f98ae2adfb1e28fe3a3b75f4505ff64b5d52adc145fed5f57fc209a90
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 11112 bytes
SHA-256: 962e74d25481a5d26086d993b6ab5a392457df5eb0fa23993b8f4f1f312a7762

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