Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa80c33766f7832…

MALICIOUS

PDF

80.7 KB Created: 2021-04-04 06:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4862349b9a78fe34406f489e3afc125 SHA-1: b916127db998d0e85e3b8f4f80bf4f12daa0cd6a SHA-256: 6fa80c33766f78327e822953302398679101e09b421a07394e0e8678aca99155
156 Risk Score

Malware Insights

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

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 0.9997

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 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 https://nipisod.ru/award?keyword=how+to+create+a+mind+book+pdf+download PDF link annotation
    • http://tatemegedes.sportsontheweb.net/39253262025.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/3wYDvu1/playmobil_ghostbusters_2_ecto_1a.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/67106869896.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/ifGjhlZ/3200167240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomuper/gojanatus.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/bstc_result_2018.pdfIn PDF document text
    • http://zugemanuzori.rf.gd/97235284165.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/what_is_the_best_far_infrared_heating_pad.pdfIn PDF document text
    • http://zekubegem.epizy.com/comorbidity_and_guidelines_conflicting_interests.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/template_landing_page_wordpress_gratis.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_1c78d609a63a491dbc5c196f5ced417b.pdf?index=trueIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_abea6cb224b44511a7e6438b9798f136.pdf?index=trueIn PDF document text
    • http://nifiwirijapokaf.rf.gd/funtoo_linux_install_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/41847296738.pdfIn PDF document text
    • http://tulutubuvidimo.epizy.com/mabojaxexotazo.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/operations_on_rational_algebraic_expressions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/break_dance_song_pagalworld.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/les_catilinaires_amlie_nothomb.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_affd7faac6704fa7a58ee407abe08c9b.pdf?index=trueIn PDF document text
    • http://kuwalenidil.epizy.com/52045064708.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

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_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5380 bytes
SHA-256: 4a80066e66cf802c4578c6b330d4e7adae372af04011901f043719a5e13a6399
font_01_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 11372 bytes
SHA-256: 0cb8516087f7e017aece189957f899cccf17ed5224d41c7f50688ecb94c8b053

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