Malicious PDF — malware analysis report

Static analysis result for SHA-256 7316a2a144226252…

MALICIOUS

PDF

78.0 KB Created: 2021-01-06 09:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: eb3e04b212ea518667339782ebca7667 SHA-1: f9d1d98eb7f5271db208f171da1a78e14659ba38 SHA-256: 7316a2a144226252aa5b4474012d98e3651661616b7ae31abfbea65c7d9f4673
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to reference product details, suggesting a lure for phishing or malware download. The presence of external URIs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafftec.ru/123?utm_term=black+and+decker+cordless+trimmer+20v PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5fdccbed2dbc3.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f9b0ee462803.pdfIn PDF document text
    • https://rekizutor.weebly.com/uploads/1/3/0/9/130969391/jebixik.pdfIn PDF document text
    • https://fodoradesak.weebly.com/uploads/1/3/1/4/131454556/wonepewipuvajig-pafezumix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5fabddec0b57c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jizubisetebof/basic_guitar_chord_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e58f14-388b-4cef-bb0c-423c81f9286c/girl_from_ipanema_ukulele.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/canon_eos_7d_specifications.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 5320 bytes
SHA-256: 30024452695384751e3f91d4d1ad4e705da30cda0b69066f82c738fb8c587ae4
font_01_sfnt_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 10904 bytes
SHA-256: bcef66c1b05bea1961908562f3ffd3bb51a4c579daf7ff5b155b71222eb379fe
font_02_sfnt_off00011cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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