Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed9da28b239b2d7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 12:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12354ebdcffd22723eef8fafbc683ce7 SHA-1: 7db09d41228526af2739e8ee23af534236859215 SHA-256: 0ed9da28b239b2d74831c187117db56a925d7abda1a5d4c7e1c6be0c4a1dd651
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on domains commonly associated with SEO link farms and phishing. The document body, though heavily obfuscated, appears to be a lure related to a camera manual. The presence of multiple PDF link farm heuristics and a critical ClamAV detection strongly indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=sony+dslr-+a100+n50+camera+manual
    • https://cdn.sqhk.co/wavudasawete/jhhjjfJ/besabibudabalakifidarupo.pdf
    • https://cdn.sqhk.co/vefusujix/igZ64hh/zuru_x_shot_bubble_ball_2_pack.pdf
    • https://cdn.sqhk.co/legusovej/eEPYifd/always_impostor_among_us_mod_pc.pdf
    • http://garugitadow.22web.org/82431713698.pdf
    • http://wejaduz.mypressonline.com/dipifejevupudosope.pdf
    • https://cdn.sqhk.co/fugovigul/hahdPjf/74156006433.pdf
    • http://favuloxodi.iblogger.org/68181182209.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://durenifujogax.myartsonline.com/bavogelobufulibagami.pdf
    • https://uploads.strikinglycdn.com/files/17828134-e2ef-42e7-99ce-2fd3480503c0/woodworking_basics.pdf
    • https://s3.amazonaws.com/genedonapubefe/chain_of_responsibility_risk_assessment_template.pdf
    • https://uploads.strikinglycdn.com/files/06688555-c2b7-4baf-870c-9a8bc286a771/why_is_the_apocrypha_not_included_in_the_bible.pdf
    • http://magomodatibotu.epizy.com/house_for_sale_by_owner_contract_template.pdf
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_747180426529472ea41b27acc19f335e.pdf?index=true
    • https://s3.amazonaws.com/lunojol/petsafe_bark_collar_not_working.pdf
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_9a29477c43774d88ab91d970bbf85a47.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1d83c250-af21-4da5-a904-c4c4612e0e5f/how_to_read_sectional_couch_dimensions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e83d.bin
dd447165e3c76a0d32b80e0895cfab4ecdf0b90db7678cd6cc4b33105bcce01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 5640 bytes
font_01_sfnt_off0000fb70.bin
1fcab452960bab88a0df1c7225a8fed88059b1f20630dbd6d7dd9583890ce9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 10320 bytes

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