Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5a3a2ef54db7a8…

MALICIOUS

PDF

90.6 KB Created: 2021-07-22 19:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 509901d804f17c955a8861ee2ac635fb SHA-1: 7b94c8f4e6ba12e0aed29154ce0edad6f8c70a6c SHA-256: ba5a3a2ef54db7a85299c3e56db500280b0803dbf31d6fe9d90cf1387b3fb1cd
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It functions as a link farm, directing users to various PDF files hosted on potentially compromised or disposable domains. The primary goal appears to be tricking users into downloading further malicious content or engaging in fraudulent schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439f47d1dd---38746635116.pdf
    • http://sure2trips.com/bot/ckfinder/uf/files/miradotenejimez.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf4eb0fd5---24016319791.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a78b994b6d64afe1a576c05182bbf8c5/64235681781.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/88cr3im670p2bm6lhpvke41q90/81811705934.pdf
    • http://digifast.cz/userfiles/14143684153.pdf
    • http://ecohort.com/userfiles/files/83742094932.pdf
    • http://www.abcklima.hu//data/editorfile/93997916732.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160711d407c671---gutivativolakuve.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608238564575f---13446788146.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/jokolut.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecb6b3048---60919693129.pdf
    • http://vivaibonomo.it/userfiles/files/39097591896.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/692b94dcecd5bd579b6427fe9000e0d2/tadopos.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/h03na1nd38t61f3fj4tpusb0nh/78637718418.pdf
    • https://peintures-descours.fr/fichier/files/17683649154.pdf
    • https://pellevah.com/upload/files/97232657787.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d1916ed4e6d---73950731615.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/bf9e5232331c0a294c26d7ddcd6f456e/34818030823.pdf
    • http://szentistvanpatika.hu/upload/file/foluvosexiz.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/86239685699.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083daef3a290---87598369917.pdf
    • https://facades-et-traditions.com/actualites/file/duroxidudu.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lsbgp1knt85t0512h4i0qor9lh/88247033670.pdf
    • https://maconlux.lu/userfiles/files/pelote.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a71006f17020d76c0e9e57d732871f2d/natepin.pdf
    • http://ahkjt.com/upfile/file/42007176137.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+do+a+heist+in+gta+5
    • 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_off0000ff60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 16792 bytes
font_01_sfnt_off00011777.bin
fa165337f341efb20f820e4cf985d541cc9b5f646065aaf5e74bf93cd71f9d25
pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 10592 bytes
font_02_sfnt_off00012f6e.bin
594464d8b4fabe7583474d7b341c49d9ae4832e001fa9c6dd5001fc15d81a2d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6E 16888 bytes