Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf67154916741eb…

MALICIOUS

PDF

81.3 KB Created: 2021-04-07 18:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d143ac9e66db70d98905eb4c7f9f124c SHA-1: 6b6aadf237b789f641bc8ff5f043d04af9fc351f SHA-256: fbf67154916741ebbcb13908e685ccc2dcb71e37cd47779e0bc78de82dc6b59a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting service and another to a domain associated with link farming, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classification strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://mezovuduw.ru/wix?keyword=bleach+nemu+lemon PDF link annotation
    • http://takipibimaxubov.sportsontheweb.net/odb_adverse_drug_reaction_form.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/RgcFjb8/evoland_2_android_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/jmgjgdN/red_and_blue_background_hd.pdfIn PDF document text
    • https://jawufilarom.weebly.com/uploads/1/3/6/0/136054640/b6354a.pdfIn PDF document text
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/raxajerukegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5fe2de7a3ef95.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/logistics_and_supply_chain_management_notes_for_mba.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/gibWjg7/delagopofevatodedixusexud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_601b992bc6098.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/ghy3sij/nuwafupazuturakiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_60140cde62c13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fe014b93f01c.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/m6163hh/basketball_timeout_signal.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/java_bangla_tutorial_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_6041cace8fadf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/17535243427.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/53145478758.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/the_coding_manual_for_qualitative_researchers.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/46850644192.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/corporation_tax_return_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/56845864387.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/rhino_warframe_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/whirlpool_washer_wtw4815ew1_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/xipobimibepefivufomufuton.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_off0000fec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC4 4812 bytes
SHA-256: 2a904b81faaa8a4203915fd5bba65484a120e08d117b63fa0e9cd3dcd4bd73b2
font_01_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 11684 bytes
SHA-256: c2818365822b8bd645efc736a17d22033a93a98af9c01c894a9bc24e2bc56d7d

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