Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f667455d55ae631…

MALICIOUS

PDF

76.4 KB Created: 2021-06-07 22:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7d46b02f13d83cba2e42e310cfa4b18 SHA-1: 6a494513a1612f4803d697b8da0b15c7bcafb8d6 SHA-256: 3f667455d55ae631ea3513bc36c8ff4076b2b3f6d265c99476d4f2e1d68756ec
164 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing attempt and a link farm, with one primary URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/pbw?utm_term=tamilrockers+2015+tamil+movies+download+in+madrasrockers
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/menuxilivele-noxatarox-faloremozo.pdf
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5ff621dde1c4e.pdf
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/tadosorarimazoj-jewazupijanuz-bojivinemekage-kiralinija.pdf
    • https://static.s123-cdn-static.com/uploads/4473963/normal_5ffc26be4a276.pdf
    • https://cdn-cms.f-static.net/uploads/4477649/normal_604d2f226e36e.pdf
    • https://biditojutorosas.weebly.com/uploads/1/3/4/6/134657596/xaperox.pdf
    • https://ruxamaref.weebly.com/uploads/1/3/4/7/134749336/6686953.pdf
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11c0babb01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xuwuziz.pbworks.com/f/functional_specification_document_template_in_sap.pdf
    • https://uploads.strikinglycdn.com/files/f6b9c56d-eec2-49d0-b282-7b3ecffcd49b/57205903103.pdf
    • http://kelivesas.pbworks.com/w/file/fetch/144691248/81062746354.pdf
    • http://lamedivu.pbworks.com/f/silenina.pdf
    • http://matajin.pbworks.com/w/file/fetch/144710694/42495933048.pdf
    • https://uploads.strikinglycdn.com/files/fb8d1c98-a9f5-4b74-a3b9-f9451f757d19/modelo_de_contrato_de_arrendamiento_de_vivienda_en_word_corto.pdf
    • https://uploads.strikinglycdn.com/files/3373031a-0e87-4956-bf05-8b457c7f28ff/calories_in_taco_bell_taco_salad_with_chicken.pdf
    • https://uploads.strikinglycdn.com/files/1774782a-6901-4ffb-93f4-cb3823b45e89/rirulinudibugus.pdf
    • https://uploads.strikinglycdn.com/files/abab5e83-f670-4d0e-979c-0ebebcae26f4/jagepazawesevasu.pdf
    • https://uploads.strikinglycdn.com/files/0ab58b9c-57e1-4180-b9af-f9042182d511/system_analysis_and_design_document_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecda.bin
111fac2efabf95e6127c280b0973a757ef521fca3a5356fe0f6534016b858946		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 5700 bytes
font_01_sfnt_off0001004f.bin
a45b497ce08326b47b2f4ab8492081c9c30335e86475b8c0b0bd0115ce99f8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 10528 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.