Malicious PDF — malware analysis report

Static analysis result for SHA-256 e275dba7ee74febc…

MALICIOUS

PDF

72.9 KB Created: 2021-03-13 17:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95860e808335e596e6d68a323aea4156 SHA-1: 352284d7d5ca17627d96f34f941176f999558714 SHA-256: e275dba7ee74febcc292fc2883147fcb4c826239f106a6892398320bb3b9120e
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 0.9991

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 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://jacksth.ru/123?utm_term=identifying+types+of+rocks+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385030/normal_602d9376b2f8d.pdfIn PDF document text
    • http://monstergym.ru/nogazedugawoviredero042zu.pdfIn PDF document text
    • http://presente-top.store/lowrance_elite_5_user_manualpuqt1.pdfIn PDF document text
    • http://vovuzug.22web.org/are_zoo_york_boards_good.pdfIn PDF document text
    • http://nukicew.xyz/complete_predicate_worksheetssi1ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5fe911b2de7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5fdc1b32282c7.pdfIn PDF document text
    • http://libertinemodels.com/317404811467vy46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479474/normal_6046f0400585d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_604cc0f432e67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/at_what_age_can_you_get_ssi.pdfIn PDF document text
    • http://manutilo.epizy.com/expenses_policy_template_uk.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_a50375f009a5473cbe675c6ac9697be9.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_d0b54c8be96c47e790f449ba78e8b8b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/laser_cutting_sheet_metal_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/95418668889.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/application_letter_for_waiter_position.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/joxaxabekixuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/for_all_seasons_yanni_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/natelamimawetekevileseve.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/ahmet_mit_kitaplar.pdfIn PDF document text
    • http://kakafemapekumu.epizy.com/queen_size_bed_sheet_dimensions.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_f464db05be7540a0aec9436d3efcc78e.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_62bc2ce262744638834dd71f6530b276.pdf?index=trueIn 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_off0000dfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5368 bytes
SHA-256: d132948b1aada5ded72091b801f7009bf38529b5871cdcf9903b5f566135a045
font_01_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 10412 bytes
SHA-256: 3f998aed3ad8fd24b04e328119d81429c312b8f2cdd7262f4928bfeb5ed6714a

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