Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa46a9653c447b3…

MALICIOUS

PDF

79.2 KB Created: 2021-09-06 16:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a609019c7b151204e796bbb626535f9 SHA-1: 0d085957b76936190a8b27c6711e955c032c4ad1 SHA-256: 0fa46a9653c447b36945fb551812df54a78ec9e1da2feb7faba4f731ddabe78c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick the user into believing they have won a prize or are due funds, requiring them to click a link to claim it. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=sales+promotion+project+pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f35a2e9d---2561971332.pdf
    • http://zhuoer.ltd/userfiles/file/56569871236.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c405a5b9ea2---46037044017.pdf
    • http://lukasikgroup.pl/Image/files/dufokifivudo.pdf
    • https://imagebrandstudio.com/userfiles/file/84682393728.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b95fcbc76---70119182185.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075caf5b8d9e---totavaponoxuteb.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315c2c27ef1---nuxes.pdf
    • https://stop-remont.ru/ckfinder/userfiles/files/lozasafusifokasop.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/lepitokoxerodafuzi.pdf
    • http://giustizianuova.it/userfiles/file/35384656976.pdf
    • http://rococosofa.com/files/files/dapujufozivezevi.pdf
    • http://ebslang.net/_UploadFile/Images/file/89078597722.pdf
    • http://jhferry.com/data/fckeditor/file///sabixunalavafosoze.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/98f2b38a5decace339a865d025fbf177/88507395274.pdf
    • http://autoscuolapezzano.it/userfiles/files/35320205.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf67725f4d---kekezabup.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bc67efee83e---fijokiravaduwodibubu.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a90c186e7---vixifefotoravuketovuvid.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6530059f45d66f7b2ddd53d14b69e633/95160203829.pdf
    • http://hiace-yoshikawa.com/js/upload/files/38946952835.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e6d168e84220a5ca679f78a04eb587db/lasafejugujufakat.pdf
    • http://artediapharma.com/upload/files/48984038619.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4a70ae63---regetibawowipunilojotar.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f033da6c3be1cf0f55eb65f77aa7a595/68414214623.pdf
    • 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_off0000cf13.bin
ee40739e93069029a424ec13a8f70ad1a4d9bd4873b621f5164a8e0541727524
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 18096 bytes
font_01_sfnt_off0000fddf.bin
2348fff3ca7c9ee2ae913e283d7dc6da2aa2923bb1af1d8f3f0e428cf6be7cbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 10988 bytes
font_02_sfnt_off0001174e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 16792 bytes