Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f615457050542bf…

MALICIOUS

PDF

74.8 KB Created: 2021-04-02 05:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7b29bbc148a0baa871b1db666b37879c SHA-1: 12a599a674b3296f630b1c61216d782b9180e9ab SHA-256: 9f615457050542bf8bea3fe37aee3a2c41a9e546f78240f85561fc0b7f690473
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://midufefew.ru/strik?utm_term=sig+2022+40+cal+reviews PDF link annotation
    • https://cdn.sqhk.co/rojarasam/6japrid/how_to_write_a_good_business_proposal_email.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/Hjbjfhj/duliperokozabibarivibovag.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/vjbhfii/stearns_ice_cream_puddle_jumper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_6030e086e7fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_605ac9a7ed266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_60666b7b99aec.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/bge7ieK/running_shoes_brands.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/jiiihig/93423733795.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwevini/82sFmig/31840660238.pdfIn PDF document text
    • https://cdn.sqhk.co/bidamasegom/FZgehiX/rexefefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_9a06b34feea74e79970c63edba8b7cd4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/79313595833.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/wonifuwobarakobibaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/game_carnivores_dinosaur_hunter.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_4a71ab21f870468b8252fa512f6735f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/eenadu_epaper_today_file.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/bsf_online_registration_form_2018.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_5172d23a3e154d16a3adc8d9cfff5006.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/56217362749.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/lupivagezamegumavabova.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_off0000e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46E 5584 bytes
SHA-256: 7043eeedd9e57e5e4d7db3b703adcde5e9fc7bc2766a1568932a7b96a6c45314
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 11248 bytes
SHA-256: 9ab28b423a3bb3b5f199246c25e8ef8d14c6d74c8b844132f31def30bc0dff19

Open this report in the interactive analyzer, or submit your own file for analysis.