Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaa9cb3b9d6a635…

MALICIOUS

PDF

43.9 KB Created: 2020-04-02 01:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2af6ee0f99394a5fbf87413130266c8b SHA-1: d036f7ec5db26576311b16ca841c1dc2abbeec96 SHA-256: 8aaa9cb3b9d6a63524a8588c9208f02ac2da36b447b67f3d8da73252e9ed63d9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as Pdf.Dropper.Agent-8998563-0. The document body, though partially corrupted, contains one of the external URLs, suggesting a deliberate attempt to direct users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8998563-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8998563-0
  • 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://amereskytech.com/uploads/1/3/1/4/131453559/131453559.html#brk+smoke+alarm+9120b+beeping
    • http://mountainsportsprofessional.com/uploads/1/3/0/6/130605355/baxubulibip-dobonapiduzoto-nogufi.pdf
    • http://aclearsight.com/uploads/1/3/0/7/130740466/2447794.pdf
    • http://benngun.com/uploads/1/3/0/5/130588426/1dd37a86b2d5.pdf
    • http://minefabaustralia.com/uploads/1/3/0/8/130813111/4c7ca166d0a.pdf
    • http://minimalclothing.shop/uploads/1/3/0/5/130546076/mutevadezigegis_rogavexexobegin_nabej.pdf
    • http://screenwarriorgaming.com/uploads/1/3/1/0/131070240/gopoz_kalabuxasudut_xebisixumo_fozob.pdf
    • http://journeytojobs.com/uploads/1/3/0/7/130738837/37136d651.pdf
    • http://ionahousemidwest.com/uploads/1/3/0/2/130289291/zemufivetov.pdf
    • http://privatelabelgelpolish.com/uploads/1/3/0/5/130588433/ffdc14ba.pdf
    • http://price-enterprise.org/uploads/1/3/0/6/130603824/2444122.pdf
    • http://phpowerhouse.com/uploads/1/3/0/4/130476816/691bef3f2a8.pdf
    • http://msprojet.net/uploads/1/3/0/9/130969825/6979d2650f7db5.pdf
    • http://engagedmarketingpro.com/uploads/1/3/1/0/131070527/sufomimomazi.pdf
    • http://linkteamuk.com/uploads/1/3/0/5/130550722/budufiroravakazudo.pdf
    • http://scotttotino.net/uploads/1/3/0/5/130589409/ruroteruzu_zinolasema.pdf
    • http://hotpan.net/uploads/1/3/0/7/130740497/8406134.pdf
    • http://contentbyjulie.com/uploads/1/3/0/6/130603779/1081621.pdf
    • http://bartthebuilder.com/uploads/1/3/0/7/130776760/nuwijaj-verevovifajeva-vufegebolefaw.pdf
    • http://bethestaryouarecjoseph.com/uploads/1/3/0/6/130621873/fa20382b57.pdf
    • http://breiterplanet.com/uploads/1/3/1/4/131408328/sefamexev_tolamawu_wixutejokum.pdf
    • http://questgamer.com/uploads/1/3/0/7/130775364/6068777.pdf
    • http://primarypropertyinspections.com/uploads/1/3/0/7/130776487/ccd82.pdf
    • http://eelasor.com/uploads/1/3/0/9/130969858/dofezamelekibul.pdf
    • http://scheffelservices.com/uploads/1/3/0/8/130873982/9fdaa35948ff.pdf
    • http://6packabhacks.com/uploads/1/3/0/6/130620482/381428d9.pdf
    • http://scheffelservices.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007966.bin
5b7b1ed7d42c179743efbef6a1b31839b69f3d6ccd15fca0f75f2d8dd0805c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 8288 bytes
font_01_sfnt_off00009953.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9953 2600 bytes

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