Malicious PDF — malware analysis report

Static analysis result for SHA-256 e679cc5a59374eb3…

MALICIOUS

PDF

84.8 KB Created: 2021-06-29 07:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef7b2580d8effb6bf6d38971b7b5f600 SHA-1: 475e1c65ee225bbd43f77607a96defef354b44d6 SHA-256: e679cc5a59374eb39ad9d2a9e12e5aab88b035d0f8fe084487ce0360465366c6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute fraudulent content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://archism.ru/uplcv?utm_term=an+introduction+to+economics+pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/zedidijukijupojeg.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d18d8dd8f---40305201462.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9ae02e52---468064457.pdf
    • http://aftckwt.com/uploads/file/fufazomasuligigiverime.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b2fd11ad372c83e610b8e8db15e1f96b/88906664191.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/80328326360.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/15da07752f99a105013af27b079dd26c/48526243031.pdf
    • https://annjulieskarpmo.com/userfiles/file/33650058710.pdf
    • http://xlsferrosilicon.com/d/files/sazosifax.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b9ee534b---58314075329.pdf
    • http://a-aqua.fr/ressource/site-image/files/27780253277.pdf
    • http://cafemsoffice.com/userfiles/files/suwekab.pdf
    • http://cuanhomkinhtoanthang.com/media/file/nivojuwelurivasiferosame.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/0e9bf3763789d67802a9b6c31b2d808f/mugasamuxugadalase.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b659998a81e---79402989936.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/wupikanibejodogonu.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/9b7a94f60630201dcabf7a5d8e8df7e5/83708899809.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a0988d86---bifigov.pdf
    • http://birnagarcollege.in/userfiles/file/bejositomuv.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4ba43dca7aa3018b9544e3bdbd42dbca/zeviloro.pdf
    • https://anmimar.com/royal/userfiles/file/beripofaril.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/95757945333.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_off0000e9db.bin
2de68b644f2c8aa2ca8865373cce1e25ae8ce713d866523b0875e5c3db49b21e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 10656 bytes
font_01_sfnt_off0001024d.bin
1fc5115335cb53ea1e4a19f12d204da382ef2d6b369f99884cfe723dad508527
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 16720 bytes
font_02_sfnt_off00012dcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 16792 bytes