Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197b44324b89ac1…

MALICIOUS

PDF

88.6 KB Created: 2021-01-23 01:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a5e6b031813fe4b1b1c9bb88a2af813f SHA-1: ef97bd063002423502daa3392c79bae60ce21c48 SHA-256: 5197b44324b89ac197d08be4da4c158bf10417bbc9950b0c0cea67b2e6baa2d0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains multiple embedded URLs, with one prominent URL pointing to 'trafftec.ru' and another to a disposable domain 'sawokinajiralar.rf.gd' which is also flagged as a link farm. The presence of these URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafftec.ru/aws?utm_term=factory+lease+agreement+format+india PDF link annotation
    • https://site-1177846.mozfiles.com/files/1177846/cbr_reader_for_ipad_air.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fe29ed37fbfa.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/14246052989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5ffde0a58e344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420230/normal_6004a571b7a2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5fc8e1ee28345.pdfIn PDF document text
    • https://site-1247335.mozfiles.com/files/1247335/58713332900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fcaacb40474c.pdfIn PDF document text
    • https://site-1166676.mozfiles.com/files/1166676/gulixetopisumit.pdfIn PDF document text
    • https://site-1257220.mozfiles.com/files/1257220/cbre_cambodia_report_2019.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawokinajiralar.rf.gd/67666089557.pdfIn PDF document text
    • http://roxeruteruda.epizy.com/medullary_thyroid_carcinoma_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/76493370179.pdfIn PDF document text
    • http://kelawezup.rf.gd/manualidades_de_globo_aerostatico_para_cumpleaos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 1724 bytes
SHA-256: a931ff3fa825443b93b369ae2d426ea300e579fad8992fa37b98769a4031c84f
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 5400 bytes
SHA-256: fb1cba047db1dca2e87128a7c51667c333e6df192fc9fb099eb509f1e700f5f2
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 10776 bytes
SHA-256: e3e240531d2691af735908f85e2b105b5992e35c7cfd24422f773db61f81b49c
font_03_sfnt_off00013f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F55 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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