Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81ed43aba598858…

MALICIOUS

PDF

67.6 KB Created: 2021-02-17 17:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ccefc2de54eedfecc9170f2ce24979fc SHA-1: 351422f90628ff395607bd183956e7302f90d7c4 SHA-256: f81ed43aba598858273a76f80b09109265901a5c8a97efade42b540faaf2b4fa
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8223

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://crophysi.ru/aws?utm_term=experiments+in+physical+chemistry+shoemaker PDF link annotation
    • http://tuguxanofa.iblogger.org/dishonored_2_bone_charms_crafting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/h3iiwTg/bafananonizunidinabul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_60279eae4093f.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/aOTjghh/q_launcher_android_10_apk.pdfIn PDF document text
    • https://tofixotiz.weebly.com/uploads/1/3/4/6/134621190/bivota.pdfIn PDF document text
    • http://fibewoz.22web.org/54178293594.pdfIn PDF document text
    • http://momijuluxesapek.iblogger.org/august_alsina_testimony_zip_file.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hmL4TA7/52015037334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5ffcbec40f085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_600b67f61b659.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/wUjbPo8/train_simulator_free_download_pc.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/178936c2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_601715cc52554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493917/normal_60102221137d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidezesu.rf.gd/lenticular_sheet_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/kawachi_fuji_garden_japan_guide.pdfIn PDF document text
    • http://donosusiligid.rf.gd/babybjorn_travel_crib_light_fitted_sheet.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/vigaxeteteve.pdfIn PDF document text
    • http://borinalujid.epizy.com/sotixurewinabuvubozanudo.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/calendario_2018_mexico_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/xevaxobemaza.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 5152 bytes
SHA-256: 3956d219a8405794deaef38bbaf6478ce9509ce976c1e2445aac90dd31218917

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