Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9cd6eb0ad39bd5c…

MALICIOUS

PDF

75.4 KB Created: 2021-02-20 18:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 144b911a0d69d96d8f0fbb09c9107169 SHA-1: 30969446f4a0f6853e86e650c5c1f74fa06fc0f4 SHA-256: c9cd6eb0ad39bd5c0eedc784dfb1a3df7ef10d1575c6877823f36fcd6401519b
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely used to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of external URIs and the link farm heuristic suggest a deliberate attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9116

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://bologen.ru/strik?utm_term=tom+and+david%2527s+top+10+stock+list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcfae1977a37.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/8dac53e121c49.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/9gcicih/lalewawabunuv.pdfIn PDF document text
    • http://avto-document.site/angelically_guided_energy_healing4us16.pdfIn PDF document text
    • http://mkr-olimp.info/hayvan_iftlii_snav_sorulark5vhm.pdfIn PDF document text
    • http://skidki-day.site/87029451831vhamz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5ffa7773373fc.pdfIn PDF document text
    • https://nulepapilix.weebly.com/uploads/1/3/5/9/135957677/muwitijobemubal_raxitabaxof_nekoxukefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_602d410886705.pdfIn PDF document text
    • http://fruitnaturs.space/89857045765cygs0.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/ijCWgcL/game_summoners_war.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5ffecfd8adb9f.pdfIn PDF document text
    • https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/ximewut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600aefcf6cea0.pdfIn PDF document text
    • http://witogitozukifon.iblogger.org/muwapigerowovujesefeneter.pdfIn PDF document text
    • http://vzale.ru/stay_alert_definition_synonymsoyttl.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/rixevozajixezos/93526825389.pdfIn PDF document text
    • http://jepameji.rf.gd/d_d_fighter_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/blue_devils_2017_sheet_music_snare.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/57914878398.pdfIn 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_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 5424 bytes
SHA-256: b3ec2688d4742284d22104ee917614ed1e03e0d32113c95ae23a5f8a2d0be5bb
font_01_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 11692 bytes
SHA-256: 3f1d3b10216da045922c6db87aecb529479674d0e86fb63f1a4e4f7d89f2f078

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