Malicious PDF — malware analysis report

Static analysis result for SHA-256 568ed5c7be5df9fc…

MALICIOUS

PDF

92.6 KB Created: 2021-03-29 23:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30f1abd7df513ea4408e9e0dc8d71c78 SHA-1: 8cfbc184cc88ccd3def991473118b7e184d5ec9b SHA-256: 568ed5c7be5df9fc1d3296eac3ff2f6ac86be12e6a32b47fa55653249013116d
186 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 6

  • 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.
  • 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://soxebez.ru/award?keyword=autocad+2d+design+drawings+pdf PDF link annotation
    • https://boletesolekab.weebly.com/uploads/1/3/4/2/134236379/vinebebevifixabip.pdfIn PDF document text
    • https://vipizavubo.weebly.com/uploads/1/3/1/4/131407691/tevuzapobinul-bavolobesev-lokexi.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/0niisgg/dukufosumezeve.pdfIn PDF document text
    • http://dexavakisepo.22web.org/angielski_dla_dzieci_chomikuj.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/jeifjf7/dimedividekiriw.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/gjwQgdY/adobe_photoshop_sketch.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/ejj9leb/moy_2_virtual_pet_game_apk_down.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/ig8jhEq/23997463721.pdfIn PDF document text
    • https://rimekadosa.weebly.com/uploads/1/3/4/4/134467829/ac712c.pdfIn PDF document text
    • https://nulazonale.weebly.com/uploads/1/3/4/8/134892754/xavob.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/muxubefo.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/mafakepepeturiz_nafekesap_bavovilitugaxez_dodugu.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/1720951.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/baxomumajapoma-serug-zunijal.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/sjeU1hj/game_monkey_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/icieUnl/59738164412.pdfIn PDF document text
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/86d02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibexalaxesu.epizy.com/les_marxistes.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/xotiragoxupaga.pdfIn PDF document text
    • http://ridupokibi.epizy.com/example_of_accounting_information_system_in_organization.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_off00012a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A55 5504 bytes
SHA-256: 5d5d281b4baf7ad50002f3c953bb9400d0e710184bf05731ffb076eccee595ea
font_01_sfnt_off00013d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D37 11292 bytes
SHA-256: 8bc1e3de90daa23a2d39a5d36c8a19d97ed305cbe79bc5e0b499be7ef979083d

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