Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74433df5d55dc99…

MALICIOUS

PDF

40.2 KB Created: 2020-03-09 07:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 3db5fc2b7accffa9933db0eaa5fdd782 SHA-1: 8530ef4d805a19407ce6ce86875af14c4605214f SHA-256: b74433df5d55dc997d39115e00f5d7b94d378ea6542c0d97341a7485d4528945
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file was detected as a dropper by ClamAV. It contains a large number of external links, forming a link farm, with the primary purpose of redirecting users to potentially malicious content hosted on various domains. The embedded URLs suggest a tactic to obscure the final destination and potentially evade detection. The file's structure and the presence of numerous external links strongly indicate a malicious intent to lead users to harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-8941482-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8941482-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://provenanswersgroup.com/uploads/1/3/0/8/130814430/130814430.html#the+animator%E2%80%99s+survival+kit+%2F+richard+williams PDF link annotation
    • http://nomadicneuron.net/uploads/1/3/0/5/130539099/gukamorefegetuv.pdfIn PDF document text
    • http://qecs.us/uploads/1/3/0/7/130739368/lusemabar.pdfIn PDF document text
    • http://erosrodriguez.com/uploads/1/3/0/2/130270953/butenugisolevizedo.pdfIn PDF document text
    • http://powertospeaknaked.com/uploads/1/3/0/7/130775704/f4338271f.pdfIn PDF document text
    • http://christellemmen.com/uploads/1/3/0/9/130969844/2325111.pdfIn PDF document text
    • http://thebamboopouch.co/uploads/1/3/0/6/130603944/8257363.pdfIn PDF document text
    • http://checkeredflagscion.com/uploads/1/3/0/4/130476074/224618.pdfIn PDF document text
    • http://jennifer-woods.co.uk/uploads/1/3/0/5/130551166/5f93c2f6bbb.pdfIn PDF document text
    • http://www.poulsborvspecials.com/uploads/1/3/0/5/130550938/tolavomepumud.pdfIn PDF document text
    • http://42abb.bpmtc.com/uploads/1/3/0/5/130539734/wegimumapugo_melerafata.pdfIn PDF document text
    • http://www.floridaballoonsinuplasty.com/uploads/1/3/0/6/130639662/mofojinof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6790 8260 bytes
SHA-256: b189a21ac72041231ab820858c79e33a4423ee1c4464dd7ceceb130eb1dfe2de
font_01_sfnt_off000087aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AA 2600 bytes
SHA-256: 78116880e9c902c31767bfa12a9ff84ada309181a52ab1aa29cdf6fbfe115b45

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