Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cd27e52cc0bf1a…

MALICIOUS

PDF

71.4 KB Created: 2021-04-15 08:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 35815fabf2965d10c515de82b90f86f1 SHA-1: 76b378204c8a8f57df2ed4f91b62fbcad4f0b4bb SHA-256: d8cd27e52cc0bf1a7664a05dd4b6bb1bdf7da3a387e148296e87249938d89224
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is 'https://gimoguvi.ru/strik?utm_term=conscious+discipline+book', which likely serves as a lure to a malicious or deceptive site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=conscious+discipline+book PDF link annotation
    • https://cdn.sqhk.co/reriwoduriju/gggijij/free_casino_games_777.pdfIn PDF document text
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/jipumitobikiwixad.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/eNhefjj/kogunokosase.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/2512521.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/sazebikapiva.pdfIn PDF document text
    • https://xofajusas.weebly.com/uploads/1/3/1/0/131069744/3eb3867f2025eb.pdfIn PDF document text
    • https://topudikuwem.weebly.com/uploads/1/3/4/0/134042537/xilezipu_nodisidapon_dadida_pagitedo.pdfIn PDF document text
    • https://subisadorug.weebly.com/uploads/1/3/1/6/131637552/378b49cd1439c88.pdfIn PDF document text
    • https://tigasedoxopafu.weebly.com/uploads/1/3/4/7/134707490/wutagu-nefupi.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/ab8394e.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/Aii5ieE/60091885007.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/2117024.pdfIn PDF document text
    • https://lurenejaxerugu.weebly.com/uploads/1/3/4/7/134728533/torev.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/jcjfghK/manual_painel_citroen_c3_2011.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/67f1113e09b0a33.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/puburajiro-xowizax-vozazotiv-geximiveto.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/icKieid/45829321376.pdfIn PDF document text
    • https://torawatuxopo.weebly.com/uploads/1/3/4/3/134379163/8803722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/72793651-dcf1-41a5-a3a9-0f335ed2e054/xezebevizodadivamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115fa305-6fe0-4899-af47-657757a3c9f4/why_is_everyman_a_morality_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aaaa5dc-2ae5-4ceb-87cb-05b1e240c0d1/what_is_the_progressive_tax_in_illinois.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ce2b34-2a72-4962-92b6-39768d3be0dd/front_storm_doors_full_view.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_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 4872 bytes
SHA-256: fcac6fb3c7035dfb59c6673eaf389753c04d63914e3366bcb3dac6eb65ec39b2
font_01_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 10752 bytes
SHA-256: 19f80d6990ed2a3cc38851252df0b08ee6fec4f472f36dc1b8008b182ff36377