Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ad34a56398100e…

MALICIOUS

PDF

96.5 KB Created: 2021-06-27 22:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 73c58e48445650eec1bba9e7b8745b73 SHA-1: 0eaeef767dc4a146d0bfaf513c3be00fb1467665 SHA-256: f2ad34a56398100e1f7310965f048989dda064da36088753ad0ddc3ace93932d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is unreadable, but the heuristics indicate a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://okfilm.kr/userData/board/file/kilopirifenizasuxisumak.pdf In PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e64ae62eb8350a7a49a91257637d176e/85174376735.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fe6da97a0543b6fd579fe2a88ef7f17a/50269775900.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/25906328673.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dabcdd3368---nirijug.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d01d0041a82---regedasewusative.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a6a0c61d---wisitofosezuwexerux.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad62aa3a0---varinefopalivaxaxuk.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/88711027739.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbad261246---povaguwewerotos.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/04q4bgscslsa911u5m5hhn6ts8/godupalojolis.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/hki7ta8qmoq0c6btvdc1k6bvp1/rofukenuki.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a0f0292957cfc47e38f2d5ec890fadde/19447503204.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/18811579724.pdfIn PDF document text
    • http://abnicum.com/files/file/84733581991.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/nafajezezoretufo.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/34980501481.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0ecedce41835de1155bb77623cb8ffb7/kagosikutumenoveloxulibu.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/698b71031c45b5edcb3511c706b01b6c/wuwezenakevamoluga.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/14027914816.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/68154881212.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/84212880511.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5c2bc7b0c47ddc1eaab2b9098962b26d/51993545292.pdfIn PDF document text
    • http://dienmattroigiasi.com/uploads/files/65200858830.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/25123df2fd26ee0caef811279840aa53/xizeberevijesedu.pdfIn PDF document text
    • http://recrute.fr/files/files/xamutuzoxa.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/31850871447.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/5lh7h4ok9u9vulcbr2llvho072/bumozexepigaparemanowodum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=weathering+with+you+watch+online+eng+sub+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 17884 bytes
SHA-256: fc920a45b3122d9bed8a303d482de81e292b8f58ec0c27e3a95896bb1f9ad299
font_02_sfnt_off00012a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0F 18236 bytes
SHA-256: a382df99d942cde4e89749b9f4aae070749fb7cd83eb764f89ecbbf76b8288de
font_03_sfnt_off000159dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159DD 11048 bytes
SHA-256: e6e2b526203dab3bc6625c0a378fdd58aad4d2c49d376e6763ab055ad873f686

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