Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2076bea178914e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-23 00:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9fed909141bd0e4cd765409841a9c2dc SHA-1: 80e2e9aa3f6ab5fc7d04250db3765e05ba02b281 SHA-256: fd2076bea178914e6d6a66e24b8a22109bc982127d7b430d01e800b59334372e
176 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, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were extracted, the presence of numerous external links and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://namthangbasaltstone.com/uploads/image/files/59141623478.pdf In PDF document text
    • https://classoft.ro/userfiles/file/nodalikupomasaj.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c864fe4b13---28429363515.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd96bb951---9992123591.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/sonodezowovujozutozo.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/18377272638.pdfIn PDF document text
    • https://stopserv.ru/files/file/xuritivadosukejo.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/gudusivalufajijuruz.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/jesetozajigozerefo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16146ddb107bd0---53752333439.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c6b7afe01fe38244773a410e79170217/99006789839.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/fuzulutirimotawar.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/runovitevol.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/jomelodafipasivivakotal.pdfIn PDF document text
    • https://sibirprokat.ru/ckfinder/userfiles/files/nowozuba.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/kozelubapejopesisara.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/zumokekewux.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/takoratililafufexa.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/84944127205.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/xupuzujadijirir.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/9ba78a448ecf7a876759a806b13c2dca/tobipure.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/suxusuvawiw.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/35674435576.pdfIn PDF document text
    • http://laserinnsbruck.com/static/batejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=moto+g3+software+updatePDF 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_off0000c345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC345 16656 bytes
SHA-256: 16e263900248c53cfe36d75562c66fcb1deadb9fd6c43909d25335c1ead65b47
font_01_sfnt_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 10784 bytes
SHA-256: 3446696a26b83714bd522da0a0eba60802d45caceb931a745c076a5e1ed5341a
font_02_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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