Malicious PDF — malware analysis report

Static analysis result for SHA-256 393b60151373c1b0…

MALICIOUS

PDF

98.7 KB Created: 2021-10-06 23:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9454721d88592fce61cdf29e4999c4d SHA-1: 1bd626a2319cf5fa17094e480154a2d18c7ddf29 SHA-256: 393b60151373c1b082752be7db5c12b9fb4d8e4f29bc27007ef0cb828458e354
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating an attempt to obscure the true destination or distribute malicious content across many domains. No scripts were extracted, but the structure and heuristics point to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://safewatersolutions.in/ckfinder/userfiles/files/jazizanofonara.pdf In PDF document text
    • https://t2sc.me/userfiles/22439178273.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021090819532496.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/36219873530.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16153304185d70---jodisagawotediz.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/xajipora.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/gekugupuxanagi.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/vikodiwegonusitimuxomaxo.pdfIn PDF document text
    • http://holzbau-napetschnig.at/wotime.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/luwuvifawarinixarekobemor.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/57388779404.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-9/20210909141149511231.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/molofunorovudonedasige.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/26162775282.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/jizofeduzagabigagasejev.pdfIn PDF document text
    • http://guitarenko.fr/img/files/jitopexilodugijofu.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/28806390064.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/72873888384.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/53683247130.pdfIn PDF document text
    • https://amgaa.org/temp/files/86465668520.pdfIn PDF document text
    • https://www.iimranchi.ac.in/ckfinder/uploads/userfiles/files/xabitepobebuwuwetug.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/gatarivenoxezo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c35649fd01---45192697195.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/botawapafosulujoraveduz.pdfIn PDF document text
    • https://mackbeks.com/files/file/bokevepemagumuvujizog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=city+wise+temperature+in+india+todayPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 19004 bytes
SHA-256: 12c1ebde29d373afc3f103c749918cc5840751459b84d7b2eb4cd8bd1460666d
font_01_sfnt_off00014b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B98 10836 bytes
SHA-256: 5868985366c325220413f1ab4893b3b9a70606225466fcea2f80dfe6313fcf39
font_02_sfnt_off000164ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1