Malicious PDF — malware analysis report

Static analysis result for SHA-256 74de34e91d409d53…

MALICIOUS

PDF

76.2 KB Created: 2021-09-09 03:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b430959948ed671d1240cb1718780b54 SHA-1: 0c265d94c8a69649352a91c4c08954c3c0a01241 SHA-256: 74de34e91d409d5373840ad6148ec9beb044fd9643b0c800388c50744459f55e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting it functions as a link farm to lure users to malicious content. The presence of external URI and link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=3+player+game+pigeon+games PDF link annotation
    • http://dienvietbac.com/uploads/files/ruligekujawitefumiwovuse.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/tolamorowefekalefazow.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/44315603829.pdfIn PDF document text
    • http://herve-coiffure.ci/files/90136064243.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/wukevor.pdfIn PDF document text
    • http://teraval.cz/res/file/bebidima.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/66408642423.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9a073d5eb366ac3491fa528ab1c6fb41/tojenuzudizewumularaf.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363f68178d6---pedugawaxijokuwemilorizu.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/gsbjk05k30opn52tg4omdehph4/2119966978.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/mibaturo.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/naxonuvezamomunabir.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/33201261578.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f78a802ecbb4ae2acef62d4a89eab279/6269110392.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/73375132889.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/muvamovewumewalefirew.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/resopoxopifebiw.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/rimaduxixobuno.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/xanutinusafakegitevifoj.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/62352924719.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/c48ccadf1e077416d8885026a972de42/tugakanibipefexagexogiwa.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/xefel.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/ramuwekivuluvotakup.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/91905518475.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/visebufexejasoruzur.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DC 10684 bytes
SHA-256: 69639738e0b741a643a102b607e44e21a370e9cf4a10966b84ac87cc9e9eb9b7
font_01_sfnt_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 16960 bytes
SHA-256: 557a8e32c6e123e771dc8a7df77a518e8c612739b53e220a3bd211aec284bdf6
font_02_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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