Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef1f41d10e10bdd…

MALICIOUS

PDF

163.0 KB Created: 2021-03-20 13:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06cc7e8277731961f3649d69dc0b963 SHA-1: d1bcfc99c030006ee552fdf3d1fe7de758346dce SHA-256: 0ef1f41d10e10bdd6b5fc26c960a5b722576d9e05cbb26a65835d0a2d294aaef
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and the document's structure suggest it is designed to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the presence of numerous external links points to a watering hole or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://xezojetit.ru/award?keyword=aquaponics+pdf+fao
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/fakotobogokawo_somanok_ranexonewufag_xegobusubetevi.pdf
    • https://cdn.sqhk.co/zovitamojim/DieeYge/siroz.pdf
    • https://cdn.sqhk.co/dodiniwotud/hihGbgf/liriwalal.pdf
    • https://cdn.sqhk.co/votojuxosaf/fhfEFKg/wusipudakafaxetov.pdf
    • http://ginixotojaru.medianewsonline.com/55400741835.pdf
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5fd92e0b2a309.pdf
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/8417168.pdf
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/juvigunepovolafukew.pdf
    • https://cdn-cms.f-static.net/uploads/4393889/normal_601c9a0f3e6a6.pdf
    • https://wilibuluso.weebly.com/uploads/1/3/6/0/136086636/6388367.pdf
    • http://wetiludivarag.scienceontheweb.net/what_does_a_blinking_red_light_mean_on_a_samsung_tv_remote.pdf
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/nufivo.pdf
    • https://static.s123-cdn-static.com/uploads/4392660/normal_60047f063b90f.pdf
    • https://cdn-cms.f-static.net/uploads/4460982/normal_60553499c827b.pdf
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fdc37c315538.pdf
    • http://jekenufakewe.mypressonline.com/2008_dodge_grand_caravan_sxt_recalls.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kizufalugomux.atwebpages.com/21457086490.pdf
    • https://s3.amazonaws.com/punagilelabon/41496727218.pdf
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_ca5c83460d1d4d929324cb79f65ee4f0.pdf?index=true
    • https://s3.amazonaws.com/kuxegu/do_dotted_line_reporting_relationships_work.pdf
    • https://s3.amazonaws.com/zamemigojat/what_is_horsey_sauce_at_arbys.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/99011473449.pdf
    • https://s3.amazonaws.com/kotenu/accident_and_incident_recording_and_reporting_procedures.pdf
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_38ffd386d04a4b2b978573577524d67b.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022cbe.bin
fc134bc7777b69c64f5e332eeb42685d7d185aec507d0d405cf448f6adf866f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22CBE 5136 bytes
font_01_sfnt_off00023e4f.bin
e593ad0b1c58ec3a50a5c7202134d06f5f1cf39300550aaae8ede4de2d0208f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E4F 12332 bytes
font_02_sfnt_off000267aa.bin
20cae6de8069e630267dc8b060c30e10a50712bad6f006ccbe3193e4f6e2f55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x267AA 16296 bytes

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