Malicious PDF — malware analysis report

Static analysis result for SHA-256 074cc6f00744489e…

MALICIOUS

PDF

79.2 KB Created: 2021-03-23 01:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9bb66e31c538a10f16bb25fe87320f2b SHA-1: d4bce793d034174c57c949fcf5696de864ae93e2 SHA-256: 074cc6f00744489e07c21d841c847788fd0e00e796b85db8dfa159f1409fba66
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links within a small PDF, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The embedded URL 'https://midufefew.ru/wix?keyword=free+purchase+order+terms+and+conditions+template+uk' further supports the lure of a free template to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/wix?keyword=free+purchase+order+terms+and+conditions+template+uk PDF link annotation
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/xofazudodavopegiwi.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/462f064a4902.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/7868902.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/hchihja/zofitilasujepunewebevozom.pdfIn PDF document text
    • http://infokurs.design/91636643787loeba.pdfIn PDF document text
    • http://copyrightviolationcenters.com/assembly_line_justicek2hx9.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jiTHjjf/is_soccer_called_football_in_england.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/jjPaSji/virtual_boxing_3d_game_fighter.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/iisFkOP/anaconda_snake_3d_view.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/7280520.pdfIn PDF document text
    • https://femuxejafedanib.weebly.com/uploads/1/3/2/7/132740958/soleguzax-furerarom-walona.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/gidOJjH/wwe_universe_mobile_game_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_ac64e2fe98bc479baeee79c96b0205c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/logitech_k400_plus_keyboard_software.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_efaac17e5711454299cc167b228ebdb2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/51671908421.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/bissell_power_steamer_attachments.pdfIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_640b61d307134218a7f420e7bcb8587f.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_dc49c161f4a0465ea8a51272bf5addc0.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_be7046a40c5246b2921a942da09e7b83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dozuga/commission_agreement_template_free.pdfIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_4c76723e026b47a69b39c842495c3675.pdf?index=trueIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_cf71f4b6acb44583937eb802f1d1c3a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/guns_germs_and_steel_documentary_citation.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_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5332 bytes
SHA-256: 9e39364daa68534ab74f7ac9713c1bc56d4f918c8b1c2f43f3d4a23aef671ec2
font_01_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 10448 bytes
SHA-256: 0f6db46f892d3c010f637bdcb06be2b66deb13a5973f4f263bc5274965b2a9bf