Malicious PDF — malware analysis report

Static analysis result for SHA-256 d680611f470366a5…

MALICIOUS

PDF

86.4 KB Created: 2021-02-23 11:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e0076aa2ba2f5aed90a7b2e10d109593 SHA-1: 23ea4ec230f9bc52e93c531fd5f4ad234f807585 SHA-256: d680611f470366a56e26fe2c8788912b1b1c8467a9c339433f5bf33223728a45
134 Risk Score

Malware Insights

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

The PDF document is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with several hosted on disposable domains, suggesting a link farm used to distribute malware. The document body, though heavily obfuscated, appears to be a lure for a service manual, likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=2016+honda+civic+factory+service+manual PDF link annotation
    • http://natorg.fun/digidesign_mbox_2_mini_how_to_turn_onyso7d.pdfIn PDF document text
    • http://sellforce.ru/50788553761i3z9y.pdfIn PDF document text
    • http://sesopob.iblogger.org/sheets_for_ingenuity_bassinet.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuvikadob/jgAibQc/double_clutching_should_be_used.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/hmjjpMt/denora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd67899b8e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_601152ec23a06.pdfIn PDF document text
    • http://lanufutado.22web.org/11205140432.pdfIn PDF document text
    • http://raisinshub.club/285243201428ov6a.pdfIn PDF document text
    • http://alania365.ru/radegubaruwesadfdnz4.pdfIn PDF document text
    • http://winsbig.space/best_bodyweight_exercise_app_android35fut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_601d003bbbd48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fdf963c1d3a5.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/ejcjbja/42497277298.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/Lja9phf/35383772568.pdfIn PDF document text
    • http://podarokinsta.online/73737484184udncd.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/laradusa/podavumokulaferize.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/current_breastfeeding_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/58800872304.pdfIn PDF document text
    • http://komupidije.epizy.com/cognitive_psychology_easy_definition.pdfIn PDF document text
    • http://gasanilu.epizy.com/ninuvebexotavowe.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/fasarizaluvevitojogof.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_off00011452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11452 5808 bytes
SHA-256: 450c1765acb83065e536e7c4d71140765c593f865c025bfeb83fa497668cfe0a
font_01_sfnt_off00012800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12800 10724 bytes
SHA-256: e7f5b8d1154836f25f55b9cbfb88060da4b0820826577aaa5659287ce3a8e1e4

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