Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c81f66f3e56af09…

MALICIOUS

PDF

75.3 KB Created: 2021-03-03 04:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 47a16eb9329c46c68b96e0c7b4c67199 SHA-1: 0d398b2f4bd40ad8513f73cd9588a160d10ac4fd SHA-256: 6c81f66f3e56af097e21dd801958d9071f61d08db882d776417a7e1885243bb3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF file contains numerous external URLs, with a primary focus on a URL that appears to be a lure for downloading drivers. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to distribute content or phish users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

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
  • 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://xezojetit.ru/award?keyword=brother+2270dw+mac+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489415/normal_6034036ef2263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480884/normal_5ff1dd5782cb9.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/1902770.pdfIn PDF document text
    • https://vubutebifakalax.weebly.com/uploads/1/3/0/7/130775259/9265644.pdfIn PDF document text
    • http://selolaz.66ghz.com/48307119822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493916/normal_5fde2129891e3.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/iiKa3Ca/del_arte_de_la_guerra_nicolas_maquiavelo_resumen.pdfIn PDF document text
    • http://wivejudotimog.22web.org/acute_coronary_syndrome_ppt_free.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/words_that_start_with_proto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5fcbc7fa2e2db.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/is_the_samsung_a2_core_a_good_phone.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/the_casebook_of_sherlock_holmes_book_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/natimen.pdfIn PDF document text
    • http://ligixuz.rf.gd/wuxepawagukapotilutapob.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/casio_fx-115es_calculator.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/valizowuxigirozitapi.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/arjun_reddy_breakup_song_bgm.pdfIn PDF document text
    • http://zezajezo.epizy.com/taninedefub.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_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 5524 bytes
SHA-256: e0074313925a1350ee53cf6fb348a2726fe7060adba1cc1f733e5851e7033cf2
font_01_sfnt_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 10204 bytes
SHA-256: 3e36a967476f7c2ccef3713b1ff6922a65ccdcd4747bdd7e7c500901e0de0a34

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