Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d22c54b3051215…

MALICIOUS

PDF

72.4 KB Created: 2021-03-30 08:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9ca37a44c41653b5e17aa9190681d21e SHA-1: 8ddbc9bade71138266c093c6348fdb9013776bee SHA-256: 92d22c54b305121595974efdf389451653d97f16159e02c10a4ccb9e313cd5ef
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://resalured.ru/123?utm_term=bugaboo+carrycot+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384819/normal_601f410ed0c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fd84c10623ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fdd61e6c03e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_6032d878113c4.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/kitchenaid_ksm2fpa_food_processor_attachment_with_dicing_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5feaec6b5c1c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fcaa2b632285.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/microsoft_application_architecture_guide_patterns_practices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_60192d2f68016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fea37f243a6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fc57718dbc09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5fca9dc465782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fdc099f56598.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/butterfly_valve_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447252/normal_5fcd884ce530c.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/watezenexaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445320/normal_5fe2e673a4f1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_1f2daaffe4db4d7e94bfc90c4237ad44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/bixezodizidob.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/pekoboko.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/in_between_the_sheets_ian_mcewan_review.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_274f7257a40b409aaf704387331893c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/jingle_bells_rock_violin_sheet_music.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_5488f8e8f3b944d7b6b55fb479e23b7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/dyson_v6_animal_attachments_guide.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_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 5320 bytes
SHA-256: ffce46d2522d697c99b60cc02d1dccfea5b20626ec5a3df2685c5ce471a9f6c2
font_01_sfnt_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 10364 bytes
SHA-256: afc9f2c148d9a59f5a3e013f7703fd7415f1a578f49841889a575700c3cb8ea5