Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bcf11af082c8de…

MALICIOUS

PDF

69.9 KB Created: 2020-12-20 19:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 41cd65110f6fd23595ae356055811ce1 SHA-1: 0264a354e040acc5bf417d60f93aa22b8624b125 SHA-256: 27bcf11af082c8def8105df708c068b466c0522aefa214d44d5ad7e154af9096
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics as malicious, including a payment redirection lure and ClamAV detection. It contains numerous external links, with one pointing to 'traffset.ru', suggesting a phishing or scam attempt. The ML classifier output of 0.999734 further supports its malicious nature. No scripts were extracted, but the presence of external links and the 'payment redirection' heuristic indicate a likely attempt to trick the user into fraudulent transactions or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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/aws?utm_term=cisco+meraki+mr42+installation+guide PDF link annotation
    • https://kelaberukowil.weebly.com/uploads/1/3/3/9/133997250/nepasanize_nofupiwo_besulevobaboja_posanojabus.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/bejokazemur/christ_ahnsahnghong_in_the_bible.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c8b6405d5340f335e453/t/5fc3f1dc3485235c86402aea/1606676957011/rixepaneb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdedf089ef447dc9d1d86e/t/5fd039b13bcf75077a7b8caf/1607481777395/jijutadurufufupexir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597938139af0376650267/t/5fcbc760a51c5a1401b2c593/1607190368478/68609797571.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/national_account_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33af424b06a7eb30e698e/t/5fd1c3afb0f0f842d7a63646/1607582639553/letra_super_disco_breakin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f7f085bf90c0efdfe77/t/5fc8819ef97c193540f22377/1606975903861/danotidoselemovofinikaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/ernest_renan_averroes.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/97297830141.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/dead_zed_hacked_arcadeprehacks.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_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 5448 bytes
SHA-256: e05f14945097ff128d814869c043bb91104fa5759a2af10b557ff56357dff901
font_01_sfnt_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 10240 bytes
SHA-256: aa70411943e3ca1da82bf9d9ced03772ec2bc6f85479035e2ed24e48a752ab5f

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