Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e84ada241d286d…

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 14:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c746f858aa1ed8981ca0035d9b742959 SHA-1: 7d4bdf9fc003b0736f93808ca39b5bdd9152c170 SHA-256: 79e84ada241d286d2df7a4dedc7ecb82cb788006c7b719a196c476cfab8bfdca
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The document body is heavily obfuscated and unreadable, but the heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830d15e0ce0---69875271658.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e51ae30c31dbacc00b0fcbe949acb4c0/tonemukitojalo.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/fafudugomipes.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/ac9b561aa5517e489d88905ac9e44d1f/vogufegafiw.pdf
    • http://baigeleather.com/userfiles/file/zefak.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6d71c624a---wekanasukupe.pdf
    • https://divinenine.net/userfiles/file/kirurul.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/br2jnic5qfrm4f361r8trmlprr/81556807834.pdf
    • https://aldapa.eus/files/galeria/files/32104457478.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d398ac2f0---27967799971.pdf
    • http://designerhouse.ru/upload/files/94910017618.pdf
    • http://anandtouristcorporation.com/uploads/babupaxetadasos.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607718d1ed6af---84577794986.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3d7107fea47d1a238a18fe295a953797/lafirebovefotofawinepi.pdf
    • https://liniagdanskzydowo.pl/files/midiboxexefagolom.pdf
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/71210847892.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae6f331528---87965193936.pdf
    • http://mosjob.ru/images/file/91873286764.pdf
    • https://tort-art.ru/userfiles/file/vekovovivebaxanikis.pdf
    • http://alternatifmedikal.com/img/userfiles/files/20339478588.pdf
    • http://vervesimuhub.com/userfiles/file/19533719547.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/eo7p08t34devjtlf7d173uut48/nawapigirejivelunijexiv.pdf
    • http://anandtouristcorporation.com/uploads/mimixipo.pdf
    • http://dralituncer.net/userfiles/file/romomabojijanorezogowix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+affordable+tax+man
    • 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_off0000ef38.bin
dca3fed9d5c5163a3a105484651d34e1d52b4ec35ffe8e1b0b2c66d424686904
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 17548 bytes
font_01_sfnt_off00011d06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D06 16792 bytes
font_02_sfnt_off0001351d.bin
cc04e542cb69415769ecc7873f59850fc9f43bede37ca49992b40deb32c0c47f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1351D 10564 bytes