Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ae9deccc8a983c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-04 14:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5a5b806e6d086261196bf233ede4a9a7 SHA-1: 809a3c31c8952c958f2ff0448aaf30b08deb78af SHA-256: f1ae9deccc8a983c06a089c35ae33cf0d30a1c652754b2e1070723e629a0972f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to reference a manual, a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=pressure+cooker+xl+instruction+manual PDF link annotation
    • http://seomagnat1.online/cryptography_and_network_security_by_william_stallings_3rd_editionji3ei.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/megoximavokisup.pdfIn PDF document text
    • http://onlajn-kassa.ru/parental_control_apps_for_iphone_ukd1so8.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/5001137.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/titezujivakenajoliden.pdfIn PDF document text
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/026127d195.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/fepimarolif-fizeraxolujaz-lasag-xevufogotaku.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/talesoxutajoju_nanedoko_xideb.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/xezizatuzuzexu.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/73099b50b0.pdfIn PDF document text
    • http://detonic-shop.website/sinalumovutonegilr2fj.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/wadivesodipanixefa.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/kozoraxepe_dubazuxef.pdfIn PDF document text
    • http://farvestnn.ru/download_leapdroid_full_versionfc7lz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuponefi/reporte_datacredito_consulta_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/basaveshwara_photos_ing.pdfIn PDF document text
    • http://lukigek.rf.gd/metal_gear_solid_6_pc.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/baskerville_old_face_normal_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/brave_movie_moviescounter.pdfIn PDF document text
    • http://kojajopi.epizy.com/50606109608.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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 5080 bytes
SHA-256: 7d3c97e521b313a7aaba6f49b8f1cf32755741bcff997e78a6c8d3b4fe65c39b
font_01_sfnt_off0000f75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 10316 bytes
SHA-256: e09ea6678f0ea33b929fc1d396a27933f5805c02e9d8252216eeb0a829ead6ea

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