Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4b4a75a484bf84…

MALICIOUS

PDF

92.1 KB Created: 2021-07-03 07:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c215447aebb8d02b1d771a2bf7d85b4b SHA-1: 78479f85910da18d95fc9a06bb2ae32025524631 SHA-256: 8f4b4a75a484bf84a1f45e73ad0c36e5509df12a9c149e353006a4737636941a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a malicious phishing document by ML classifiers and ClamAV, employing an advance-fee scam lure. It contains numerous links to external sites, many of which appear to be compromised or disposable hosting, suggesting a mechanism for distributing further malicious content or phishing pages. The document's structure and embedded links strongly indicate a phishing attempt to defraud users with fake prizes or delivery fees.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://rzn-house.ru/upload/file/85206180116.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/fcd4d0119373719e496db64969e4c0c4/biwogidawatopufut.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace882aea17---43785375994.pdf
    • https://mszukam.pl/dat//file/36644967552.pdf
    • http://artecgroupservices.com/imagenes/file/46720737647.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7a48bb5f7f20e6c94e412ad0eaec57c7/bomesogonemotebonezezavij.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210523054909.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/2671110365.pdf
    • http://savages.lu/imagesRTE/files/famobikosuxokiwuzibiwuter.pdf
    • http://duquenne-moteurs.fr/webroot/upload/files/25929824924.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe561ad94---kovisigaridirunuwe.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a67ce80ba---zifusubogutasepalof.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/bf613edc05e5bde819099813f42e8aad/tikilajum.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/e69u7ae9afgb4h1v07e0usjh9u/toturepogenuzuw.pdf
    • http://unipsyclinic.com/userfiles/file/20210620171234.pdf
    • https://shopinhome.com/ci/userfiles/files/11454762352.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/217d48161edaa8df913eba454e1a53d4/lalogubowizixo.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b57cf6bbbbf---91745333062.pdf
    • http://pronobile.de/catalog/file/74733194610.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6e34d71457b5c5a820c9b67853a9c30b/gajat.pdf
    • https://agrimal.pl/userfiles/file/sexen.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d0d29777---83596294541.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9c72817c---6017364206.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=you+decide+it
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 16792 bytes
font_01_sfnt_off000116a9.bin
2abe0c56da87cca4b104e78d5782f2d77bf74562dbf88c89eef68a740d87651b
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 9868 bytes
font_02_sfnt_off00012c7a.bin
0ed2ed1f88596de58d522c03d44ac6bb1cde52a60ad5fbfabf6762eb30d13123
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7A 22808 bytes