Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b2a1b6ab0fd9d8…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 18:34:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa2d329bd38ea1ab1051a78a22d0391d SHA-1: 9abd62ede13218704a0c588cedb09197435730c5 SHA-256: c4b2a1b6ab0fd9d8ba2b379e9ba53474a43a6971bc682dc50e6cfa7c08fc7f32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://mezovuduw.ru/award?keyword=personal+branding+questionnaire+pdf PDF link annotation
    • http://pisodaseveporow.22web.org/21163160853.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/zatozuvuvupijubudutusopete7k80.pdfIn PDF document text
    • http://repair-monokoles.ru/plane_controls_for_pcscvox.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ficaAhg/sozutidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_603aeb32c0e99.pdfIn PDF document text
    • https://cdn.sqhk.co/vemikozoj/EQjdjqS/slots_for_free_fun_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/LgcXigN/fekigimafibebadexewilelo.pdfIn PDF document text
    • http://my-favshopg.online/paxemixineroxi2qk1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_60020e0524c4f.pdfIn PDF document text
    • http://pinurifosejo.22web.org/9925928491.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/eQieEuy/genisolapi.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/hcqxF2v/29524874383.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/hlmjv8R/63477991330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_60421fb299724.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/g2dHhho/nukab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_6010950137de6.pdfIn PDF document text
    • https://cdn.sqhk.co/murevexi/dvo1bhj/padaguperodoterurip.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/joYJhjY/xedaselerogebu.pdfIn PDF document text
    • http://bestgirl69.com/285572465083bu54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5ffa88c437645.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/izxHSNa/wyze_plug_not_recognized_by_alexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepikadagutuv.epizy.com/hp_elitebook_folio_9480m_i5_price_philippines.pdfIn PDF document text
    • http://tevomare.rf.gd/what_do_you_have_for_breakfast_on_the_mediterranean_diet.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_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5476 bytes
SHA-256: 5f38cb3281e80fdc913fa290d63ea8238c95a3214c3107a9e5a83306f01fd199
font_01_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 10564 bytes
SHA-256: 66e2b9af0a421b570af84d75f2eebab5e0a519e42d79ee317953edeb9519d184

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