Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f896a228a7c38f…

MALICIOUS

PDF

79.0 KB Created: 2021-03-31 20:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ffc652ad821afc82cf2e509f6e16819e SHA-1: 2a9093c557d4e0fde0eeab0b72b93a8d9c024c79 SHA-256: 35f896a228a7c38f4a1eaebdd866a03541211d63492e672e4f5a708e7e17f1f0
124 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting an attempt to distribute malicious content or phish for information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a deceptive online presence for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8211

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://dugedepap.ru/award?keyword=brochure+design+ideas+pdf+free+download PDF link annotation
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/5143622.pdfIn PDF document text
    • http://fortuneo-enligne.com/anandam_mp4_video_songs_freef3sxe.pdfIn PDF document text
    • http://magazinrf.xyz/69028928562m1cc5.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4866775.pdfIn PDF document text
    • http://kmplitka.shop/xewadunepasodugazlmm7r.pdfIn PDF document text
    • https://kodalisurodufe.weebly.com/uploads/1/3/2/6/132680932/busidovuzezudim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb2b3ca804b.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/denododogu5yaif.pdfIn PDF document text
    • https://teroxomiguwadi.weebly.com/uploads/1/3/1/3/131380052/jixiwarulana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_6003db893f564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/32406e52-eb89-4125-8382-b3e73629a436/what_are_the_three_major_periods_of_egyptian_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a5f3abe-47ce-4c4c-8ac5-c492d54489dc/61783451146.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/maravilloso_desastre_sinopsis_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/nitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fb14ce-cce7-4f65-935a-680839b02cad/el_1_es_un_palito_el_2_es_un_patito_cancion_infantil.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 5556 bytes
SHA-256: 4dcba140f3ca9d2c56c70d761b26d938fa41db191e969a037c57c53c39b6e8a4