Malicious PDF — malware analysis report

Static analysis result for SHA-256 825370e1aed795eb…

MALICIOUS

PDF

78.8 KB Created: 2021-03-02 15:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a780cf460bcc009bd6943baa9dd235cd SHA-1: dc0e77123475598475f8d6f733a7fcbb907e0422 SHA-256: 825370e1aed795eb034133808615f6699357e1b4c6f8a27cbadd7143d1976c86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as a phishing/malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to product reviews, likely serving as a lure to direct 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://soxebez.ru/strik?utm_term=is+the+audio+technica+lp60x+good PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/2137627635y7jzf.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/NhagfFh/dulojipetodegexexoviro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_5fe785b4a7857.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/gjjiepX/chocolaterie_around_me.pdfIn PDF document text
    • http://kexisugotiro.22web.org/lovokunaxa.pdfIn PDF document text
    • http://idealica-uficiale.website/five_night_freddy_song_4nwcjw.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/MSgfgfY/nasacort_coupon_walgreens.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://govezijatin.rf.gd/how_to_descale_a_keurig_k400_series.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/76799325705.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/lemebuv.pdfIn PDF document text
    • http://gojetovumivet.epizy.com/sony_camera_4k_apk.pdfIn PDF document text
    • http://gebaruzowulidus.epizy.com/21266780824.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 8

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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5540 bytes
SHA-256: 907ebeb2456c818c3ff5e202b48431ba2fc2ea0c55ea4881ca2b831351a79014
font_01_sfnt_off00010af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 10452 bytes
SHA-256: 4cfa1ee2862eb61f4eb5cbe912635f5727f3e56dc2f0ae47419c08d6db8b8e44

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