Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8704908a4fb9416…

MALICIOUS

PDF

69.9 KB Created: 2021-02-02 15:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3c97b05f55869b3c9ed6464abff13ded SHA-1: e328f63992141d923aef2d3087579584da9a9b89 SHA-256: e8704908a4fb941602714c54fe2d6ba4b5666b4fb43d6c85374332e7b2d80ab1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL pointing to 'https://baarspo.ru/123?utm_term=halo+reach+ranks+and+unlocks', suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=halo+reach+ranks+and+unlocks PDF link annotation
    • https://cdn.sqhk.co/tinodifozeza/jhehfie/fejonirux.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/haifje2/77878024931.pdfIn PDF document text
    • http://betmoy54.com/animated_content_aware_scaleomtwx.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/ifuifdo/instagram_downloader_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/8gfwhcY/veduvugoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/lutumodigi/heMjehd/pitazuxajutad.pdfIn PDF document text
    • http://ericksandoval.com/viniplus_ultra_sherwin_williams_es_b3icn4.pdfIn PDF document text
    • http://visionnew.xyz/339130177472i098.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/saunders_veterinary_anatomy_coloring_book_free_downloadilq7k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://samanofi.epizy.com/jisaribowozegu.pdfIn PDF document text
    • http://tidefos.epizy.com/48705289483.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/half_and_quarter_turns_ks1_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/winrar_2019_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/6555031004.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/linux_split_to_jpg.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/97443344562.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52C 5052 bytes
SHA-256: e03ab1fad69f07b1ec55dd179fde965e68fdc01ef4226ccd42277f3d7269fc3d
font_01_sfnt_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 10688 bytes
SHA-256: 31cabc4afe1d074460836b2319952eb47e8b7cdebb3bed3323a406245e9520c0

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