Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ae19e99a0d6672…

MALICIOUS

PDF

67.8 KB Created: 2021-01-01 09:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: de99f47fe0adcfb5b221029c968c67a2 SHA-1: 969203cc85ddf1f0534b9451c0dcda6aa40b7253 SHA-256: 07ae19e99a0d66728fac976a24c7f4d8d8d77370e12fddffbae2335b89750840
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?utm_term=2010+vw+beetle+owners+manual PDF link annotation
    • https://birupilanakok.weebly.com/uploads/1/3/4/0/134017156/83c037e6a7.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/hdmiiR1/23163717708.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/zowijolu_vakaka_supepapetaxog.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/b44e43d8b9.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/higjHii/rugazurezotako.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/JkhaUnE/authorised_push_payment_fraud_compensation.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/8429852.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/dugeburetobuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/gcia9jc/dream_league_soccer_19_kits_barcelona_2020_jdt.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/4188210.pdfIn PDF document text
    • https://cdn.sqhk.co/sodovokak/jcgeoZA/86583931950.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/dudigonifu/wirijizepibut.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/nisokekukik.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/jsa_template_qld_free.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_off0000cc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 5356 bytes
SHA-256: 7c7f68af5079ae701caa2d1231d97f59406bdea33135cb6a82137d9f409d205a
font_01_sfnt_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 10588 bytes
SHA-256: ca181c0a37bf242a356c29eccf5a5bcfafb26f1d20ee6b389c581d401a19fa87

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