Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30fd9ddab607e49…

MALICIOUS

PDF

76.0 KB Created: 2021-03-26 17:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cff417145020dba8f346ca135e508e4d SHA-1: b387feeba766047cdcaeae5d2f5214e7ba835b0c SHA-256: c30fd9ddab607e490a0a22bac005273487cd646cace3c6b05663ff58755ced6a
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a link farm and a phishing lure, specifically referencing an invoice or payment. The embedded URL points to a domain associated with malicious activity, suggesting the document is designed to redirect users to a malicious site. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or further payload delivery.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gimoguvi.ru/award?keyword=vehicle+check+in+report+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374207/normal_6006168cad3d1.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/10359108990.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerefe/jggijja/gefixud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5fe880aa222a2.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/dabidubovujuvivomit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470968/normal_5ff13999d4b23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_5fd827eb1c957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_6006e5d742433.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/ajhfjee/71500007723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5fd907ba26e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_6045fd22961bc.pdfIn PDF document text
    • http://nekazupafo.mygamesonline.org/33737024089.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/todokofolevok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d4f3ce-e94a-481b-a0c8-6432b55ed468/sunbeam_bread_machine_recipes_5891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26913626-2d4a-46ae-88d2-6106b7593865/65738068366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1975b38-35d3-4c8d-a627-23fbd0a0be1c/xadimuvumorabaxoliten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e41107c-c9e2-4909-99fd-9f814e79ae02/ti_amo_cosi_tanto_meaning_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504b2857-3ff5-4227-bf72-618200c972d3/fumiwen.pdfIn PDF document text
    • http://vekejuf.atwebpages.com/pijuwudusoxajixuropijetuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a69315df-7d08-47ce-a87f-f3c028b3054c/are_old_nancy_drew_books_worth_any_money.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 4884 bytes
SHA-256: c5309535f36fe16587aad8214fbbce088c62edfa6d2ec7c54822e9512d9f054c
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10556 bytes
SHA-256: 94dc9f7b5c56b272cb129685d86974903912e7002ef34d76e2610af172d3732e

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