Malicious PDF — malware analysis report

Static analysis result for SHA-256 72949da43ed0915b…

MALICIOUS

PDF

73.9 KB Created: 2021-02-26 00:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c32cb51fe4869c8a49e75930a35c534c SHA-1: d09b84b42826426bcde2fb8087a6018ccd834067 SHA-256: 72949da43ed0915b44faae0433902abde17386d052e74a39d374651b4be13840
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics indicating it functions as a malicious redirector. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to 'youth football playbook pdf', likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=youth+football+playbook+pdf In PDF document text
    • https://cdn.sqhk.co/tekonunise/ifRhdgh/misikomunomanogoruterula.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/partes_de_un_motor_de_corriente_directa.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/33660451361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474750/normal_5fe029cf1ff1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_601d3d4e3c931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_6018d0379d33a.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/fxfhe3H/hitman_2_gold_edition_pc_requirements.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/sennheiser_rs_175_headphones_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/3hfkfgg/letedujinaturigakike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_6026ab779769b.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/44658089145.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/osha_safety_glasses_training.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_60373ed27432d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/volando_sobre_el_pantano_audiolibro.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/63829466742.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/90030935156.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_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 5120 bytes
SHA-256: a1bbc20286e7450626bbec20fa16d775640441fccc8958d070c3f14ceb55dbe2
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10272 bytes
SHA-256: 681ff97e2a928ef0aa71c8e55e0191f2fc6ac7b146117f743bf8f3b893b4e2ba

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