Malicious PDF — malware analysis report

Static analysis result for SHA-256 42756e7e14918695…

MALICIOUS

PDF

77.1 KB Created: 2021-01-29 20:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7918e4186bb0bd0918f155393872aac6 SHA-1: fb78b3a2539c013a1b08451a8cfbc153a4cb266c SHA-256: 42756e7e1491869587c7032b7c317d70412ac25d3660f01b8c7da718599be679
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=position+in+space+occupational+therapy PDF link annotation
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/xobalatubemawekij.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/hsOjchc/wutetimejiwivida.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/Dij9jjR/94827047116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449968/normal_5fc8532b00cec.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/2641131.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/xozevo-bigipotutoke-xufuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/AsgdjjV/best_equalizer_app_for_macbook_pro.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/rotunejebeperikig.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/d79376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fecb14d007cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_600b0f27859ed.pdfIn PDF document text
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/1b38d0822ff04ec.pdfIn PDF document text
    • https://mibonujatupogu.weebly.com/uploads/1/3/5/2/135297119/zigeneferomimozixu.pdfIn PDF document text
    • https://dirututusobed.weebly.com/uploads/1/3/5/3/135347210/4576108.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/gdIjihe/42038477612.pdfIn PDF document text
    • https://denosofebulapan.weebly.com/uploads/1/3/5/3/135347567/wikixojebufudereju.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/ghgPmia/guess_the_tiktok_song_by_emoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_6001eb5c4e496.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/genijusemu/lebenslauf_template_indesign.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/xisap.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/register_marriage_certificate_online.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_off0000f332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF332 5124 bytes
SHA-256: 17ce0f8b772156dbb28dc59ea7df30779afccca04597b5b6cce7aa53b525324f
font_01_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 10032 bytes
SHA-256: d497de089e5b950d048fb4b5c00d113dced983568747aed54799b4bb6b830d73

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