Malicious PDF — malware analysis report

Static analysis result for SHA-256 498e14a64f4e361b…

MALICIOUS

PDF

106.5 KB Created: 2021-04-07 06:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8240ce410486037fe1e4383ecb012442 SHA-1: 5480895a8bcaabe566d2d09f74339655c4c0075f SHA-256: 498e14a64f4e361bbc093cf4ac611b13a7644ec9b0d9818ef357089183e8a6d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://druttle.ru/award?keyword=batman+the+killing+joke+comic+pdf+download PDF link annotation
    • https://cdn.sqhk.co/fusureviweki/iaXJlhg/59138715844.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/uW5ajiW/76537745489.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/rocket_propulsion_elements_download.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/sazakorinolak.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/66045275870.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/28852664027.pdfIn PDF document text
    • https://cdn.sqhk.co/watexoba/ghCIiie/asphalt_nitro_online_hack_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/bZhflPu/28259788465.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/betaine_hcl.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/37755957559.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/benny_golson_whisper_not.pdfIn PDF document text
    • https://cdn.sqhk.co/sezibagigi/9hhShfj/tizonubatisufodifubek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://susijul.rf.gd/memol.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/attorneys_act.pdfIn PDF document text
    • http://putotapuzavip.rf.gd/plural_form_of_the_noun_alumnus.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/data_analysis_using_excel_2020.pdfIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_088df475a2bb4d37bc0fb7beb0298080.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_efcf3cf2f0894d11a7d8743e42d5cfb7.pdf?index=trueIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_926d82213d4b4c6589348b4ea63f7bbd.pdf?index=trueIn PDF document text
    • http://zovuzizosagedip.epizy.com/mefazasepuf.pdfIn PDF document text
    • http://wozawexopad.epizy.com/mansa_musa_civ_6_guide.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_2d709da4cf534277b953a73e4c5e898f.pdf?index=trueIn PDF document text
    • http://kepawomokatuke.myartsonline.com/16252099520.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F1 5576 bytes
SHA-256: 999814caf85990f1013b68e0ec65debd83c437a6f509601866703e8c4fa853ac
font_01_sfnt_off000175e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175E9 11052 bytes
SHA-256: cca0db13182ff3706dbbee8aacb85623ec9d2c732810d09096ff099443963740

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