Malicious PDF — malware analysis report

Static analysis result for SHA-256 5367793213b5b278…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 11:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ee83de736bb4d09f2253990f18627883 SHA-1: 01cdcd22d0310172ec9f9d60b19b52cfbbec371c SHA-256: 5367793213b5b2781a18e1e1f75e25d02600f7092fd14d2e8fbde32c8b6548e4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, appears to be a lure for a vehicle owner's manual, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/wix?keyword=2002+honda+civic+ex+sedan+owners+manual PDF link annotation
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/xugufatopo_gejukuzawogu.pdfIn PDF document text
    • http://infonewsuk.site/jonevufumomizobabv5jm.pdfIn PDF document text
    • http://gallery-shop.site/kizabimat4dwhr.pdfIn PDF document text
    • http://zdorovienashevse.xyz/kowemotzptp.pdfIn PDF document text
    • http://persequenteamsohbet.com/lista_de_verbos_regulares_en_ingles_presente_pasado_y_participio_gerundioshgmz.pdfIn PDF document text
    • http://tiktokhd.design/pegafesv00ng.pdfIn PDF document text
    • http://dixajarinuvaw.iblogger.org/33923020057.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/d49fb4.pdfIn PDF document text
    • http://0fruits.space/67884238730kwsoi.pdfIn PDF document text
    • http://stankovit.ru/how_to_fix_ld_error_on_maytag_washerj67eq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowifojabar.rf.gd/goat_simulator_free_apk_mod.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_ac4ee13ae0624de49bc2127ce50ff5ca.pdf?index=trueIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_b5b2a62097094312a036b60acc5de010.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_1116dba9f4c8481e8584285eee1c9851.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_c745dc3af5244ba4b8359489bd13a5b1.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_9ef76cfdbb984a968e8687caccacb521.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_d1b64f3f8bdd4fb78ea7d557a8de9437.pdf?index=trueIn 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_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5580 bytes
SHA-256: 00f4a909c59eafb09e8484a1d1155a5165e5aa2aeac995cc3770ce1eb680a5d5
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 10820 bytes
SHA-256: 96c89c7c4f2e6057e50617b69c758d2c0564a41100fcca1a1e999d0fe4d6e454

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