Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6a3f5fb010242f…

MALICIOUS

PDF

64.0 KB Created: 2021-03-12 16:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e1d8321241a85e63d98adcae6f6a05e SHA-1: 725f13b5c97c369a590b6f4816c7da8c34d2ebdf SHA-256: db6a3f5fb010242fffb24041b49f333626050a1d5b35c747b6240ee0421d0419
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to deceive users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to academic content, suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8535

Heuristics 4

  • 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
  • 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://resalured.ru/award?keyword=culture+of+animal+cells+freshney+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391920/normal_600bfd27aa3ca.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/how_to_replace_a_kindle_fire_battery.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475406/normal_5fdf2f1e5c59e.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/clustering_techniques_in_data_mining.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485689/normal_600e725f4b38f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5ff387a5b6019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_60381642d2863.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/26850391947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_601839510505c.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/what_are_jobs_daughters_names.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/41210891321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_6031ef3b57316.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/9230837082.pdfIn PDF document text
    • http://wenenejenataf.iblogger.org/resumen_de_la_obra_doce_cuentos_peregrinos_por_capitulos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422163/normal_60002645b0aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_600b3d12e7ca5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipipigi.atwebpages.com/budaya_indonesia.pdfIn PDF document text
    • http://nozefemalevarug.rf.gd/destiny_2_izanami_forge_unlock_guide.pdfIn PDF document text
    • http://zusilovame.epizy.com/amlodipine_davis_drug_guide.pdfIn PDF document text
    • http://miviguwi.epizy.com/causes_of_excessive_gas_formation_in_abdomen.pdfIn PDF document text
    • http://labutebumir.rf.gd/guidelines_esc_heart_failure_2015.pdfIn PDF document text
    • http://pavefobigemaxe.rf.gd/99077265920.pdfIn PDF document text
    • http://zotuzibufuvonif.rf.gd/soraxiximawuga.pdfIn PDF document text
    • http://zirejivotaw.epizy.com/an_astrologer_day_story.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F4 5404 bytes
SHA-256: 2bf24d33b042f12c637b55fae5914251738ca7bcdddafddafee19f0a6cf93ec2

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