Malicious PDF — malware analysis report

Static analysis result for SHA-256 975fac17be099c9b…

MALICIOUS

PDF

77.0 KB Created: 2021-02-21 11:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 313ec2f04ac42912b3ee5c257ea4601e SHA-1: d6944ff80a06550a5cf201939039c7dec750d5c2 SHA-256: 975fac17be099c9bb95d195081b0ed3b81aad510cf309efca79c8725be0ce3a7
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing and a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/7dca6cec2372.pdf.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=avatar+korra+google+docs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379489/normal_601718d141204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_601f07afab898.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/7dca6cec2372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5fdc197d12d36.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/jomumomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462075/normal_6002d4687bbc7.pdfIn PDF document text
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/f183fffd7419e.pdfIn PDF document text
    • https://fujifarilopo.weebly.com/uploads/1/3/4/4/134483008/xulin-zajas-kokimovovi-purutetuxolox.pdfIn PDF document text
    • http://buxizofi.22web.org/how_to_use_braun_ear_thermometer_6500.pdfIn PDF document text
    • http://xuzevofut.22web.org/jamelusuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5fe2d82e169ab.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/tugumeb/boolean_algebra_identities.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/blister_packing_machine_manual.pdfIn PDF document text
    • http://sufelubunat.epizy.com/peinados_para_cabello_largo_hombres_formales.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/76779307161.pdfIn PDF document text
    • http://zidarebuna.epizy.com/46192020983.pdfIn PDF document text
    • http://pivomowofafo.rf.gd/gefubilukusojorafutojam.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/64297558632.pdfIn PDF document text
    • http://nafebuxu.epizy.com/gedogufedamukarera.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/wakukivapikori.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_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5220 bytes
SHA-256: 75d350f16538772353fe076f078601e688b6d5e92fe17e36b7ddcc12bd91f2c8
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 10704 bytes
SHA-256: 83f9c9c202597d9bb36c9256e8e4ab9708c8a4897c960a0328b85f85d62ab8c5

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