Malicious PDF — malware analysis report

Static analysis result for SHA-256 302e9f30f6af3a2d…

MALICIOUS

PDF

80.5 KB Created: 2021-02-20 18:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a5a304b46af53e083dfb0b27a9150717 SHA-1: a01d035ac3e9c5755a9d14e304c663fb4cabb3cd SHA-256: 302e9f30f6af3a2dfd4fc39673ce169debffe3a6c6fb08ab395c59e857702b1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference a 'stock list', a common lure for financial scams. No scripts were extracted, but the presence of multiple external URIs indicates an attempt to redirect the user to a malicious site.

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://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://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_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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