Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a29eccf7e6f3a60…

MALICIOUS

PDF

85.9 KB Created: 2021-09-04 13:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3b861ea0b840f7c99d749861cb54a28 SHA-1: 27524a97414a2ab5ef88b9717c33ffa52b5a5e15 SHA-256: 3a29eccf7e6f3a60505570158b08054b4998bc5caaf15e422de445f93d260af4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=endangered+animals+list+pdf PDF link annotation
    • https://cafesca.org/ckfinder/userfiles/files/34215727296.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/rokudixafapepafokafawe.pdfIn PDF document text
    • http://canadanur.com/resimler/files/difikepadev.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s168082b6vcnlmbiiqtgv3ka02/67945595686.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/tevebedubulokexixiruri.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/73447259720.pdfIn PDF document text
    • http://dzbnf.com/upload/file///xakikemakojiwuzilexaji.pdfIn PDF document text
    • https://makenie.com/upload/files/55493966715.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/62567212855.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/momudolenabaf.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/fefigulap.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9fc55503---safusabivubavaxo.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/854a343ddd232718f739e57f8dfaba80/pawipinowefufosola.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5a1932f0ecf3979eddeb6ae1ac82cd7c/18710892338.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a004675bcf6---74465953187.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c322f23c43e---raturemo.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ofmf01utvtrepaqocchdedmiki/koxurezumuguxajo.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/2ktf4o6fbc4102b924pead76o1/82453304515.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/sokalezufajawuze.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a831f4ac435---28858404087.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/juzuganolizitisu.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/geriwamidivumerijemenobu.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/18234177750.pdfIn PDF document text
    • https://groupunsur3.com/contents//files/36327296636.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/77jq1rkub75a1uomvpbmf2egag/1812068206.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/12490998050.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_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 18192 bytes
SHA-256: 763e806b7db38311fa3a094ec7c2fd8dd1a085663f31351dc9c0edd2d8bc0fbe
font_02_sfnt_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 10704 bytes
SHA-256: 33e3776935121210fba8d56e704700b175ce25a636f8ca0a92ae16ab79a254ee