Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2babc9e0fbcb361…

MALICIOUS

PDF

92.2 KB Created: 2021-07-01 16:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7799b10c64966d3c8a96b44259f590db SHA-1: ed3710b38d7313df0424e5d8b2d086fbfb85bf0d SHA-256: b2babc9e0fbcb361ae228be83e37010e16611fc9ce341cb2e7943e761a16ff93
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085082ce0375---62073165837.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lf096l39vl672a3nf1gkqsp61b/fifataxe.pdf
    • http://n2nnetworks.com/files/others/24912283420.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/13578b63aad5c951ed87ab01fdc496c1/80980606258.pdf
    • https://psystat.net/candyticket/uploads/page_images/files/peliwadi.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f68a33cb7---27129243461.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a4e7db81---29045720609.pdf
    • http://altaprecision.com/userfiles/file/37828096696.pdf
    • http://com123.vn/uploads/file/21861293733.pdf
    • http://capmar.eu/userfiles/file/45159943471.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d7fc6c1a---vejizuzif.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ld116sf09ch7tuc4mdb61dqik1/34345534514.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160948ff5d6633---19400760767.pdf
    • http://top-conversion.ru/ckfinder/userfiles/files/japejetijotoraratizetam.pdf
    • https://victorybear-info.com/userfiles/files/rigeni.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0c5cd260f---tovobuvetozuveletizubo.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c37d57577---53175603057.pdf
    • https://bursakaynak.com/userfiles/file/43751114977.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37f4ab1b5---46857419943.pdf
    • http://zabradli-znerezu.cz/userfiles/file/fajewiduwudidipareb.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee26e1a1c---48197370802.pdf
    • https://annjulieskarpmo.com/userfiles/file/69350084216.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7ba2402e---44688513138.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/316a3d0e76336b8e1218b969efc0c183/voxobapajuvasela.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=estate+by+the+entireties
    • 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_off000107cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 16792 bytes
font_01_sfnt_off00011fe4.bin
4aa0af796ab0f4d9206ede0dc8dd25de73e63554174142e2af16fd0543a54a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 10276 bytes
font_02_sfnt_off000136f8.bin
899b598da5fb925a07724c27bfdb06f0511cebd20c2eab6f0d4c6cbc8fe980ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 17308 bytes