Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c30e2f66613ab6…

MALICIOUS

PDF

80.8 KB Created: 2021-03-01 16:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8f967e678705e6e7538b8bd93e19e6e3 SHA-1: 75d1b7f10292cf96cb553cf50f3f9d7f697d1d8e SHA-256: e7c30e2f66613ab6a5ba7cfd34bb8093e2d2acda05df67bb19880e557b904009
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains references to 'Maytag dishwasher owners manual' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The presence of external URIs and link farm heuristics strongly suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=maytag+dishwasher+owners+manual PDF link annotation
    • http://visionnew.xyz/casey_at_the_bat_worksheet_answersros7w.pdfIn PDF document text
    • http://netewe9.xyz/22101309008sbndg.pdfIn PDF document text
    • http://podjem2.club/xefeketibakemc9zn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_600e4157eff05.pdfIn PDF document text
    • http://fb-copyright-help-from.com/fe_civil_review_manual_free_downloadw3d8e.pdfIn PDF document text
    • http://gsmall.space/xilinusosewuzakuzibifod5t960.pdfIn PDF document text
    • http://rastet-malysh.ru/henry_and_mudge_the_first_book_questions6axvu.pdfIn PDF document text
    • http://xavanafaworinev.iblogger.org/nuxobo.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/jndngfg/voa_farsi_tv_frequency.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_6017a67d09f00.pdfIn PDF document text
    • http://show-visitor.xyz/25991149975ql7rv.pdfIn PDF document text
    • http://teksol.xyz/260477849310spmf.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/livre_guide_pratique_huiles_essentiellesh5mzt.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/sujozamadovefamusanomjhm7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukofov.epizy.com/3m_fastbond_10_datasheet.pdfIn PDF document text
    • http://risumipekalur.rf.gd/what_is_the_gender_role_theory_in_psychology.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_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 5440 bytes
SHA-256: d603316a672c5061b3c3c3b4477eaf3bdd3b54fa94ba67b9b53299709b8e7546
font_01_sfnt_off00011123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11123 10796 bytes
SHA-256: 5aa2aaa5204ced9e7187f37dd94c5ccf229c1d506e52f5af8fa4878022f13504

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