Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8f92d16bb35cda…

MALICIOUS

PDF

82.1 KB Created: 2021-09-20 00:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 59320404c07293ade640e96d62bec122 SHA-1: 903e8981db7692a1d2fea8e1c57af3fea690d8b9 SHA-256: aa8f92d16bb35cda5f3bf48d7585f895a242d512dfecd674236a7a7a4331a36b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://dongzzang.com/userfiles/file///45172358689.pdf In PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/24195696738.pdfIn PDF document text
    • https://ambalatender.com/upload/files/26958398094.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/makana.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qj6mf88iru5vdgo056mntq536u/mopadawobajuwawul.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/18713697709.pdfIn PDF document text
    • https://ccskin.com/geektic/files/purixobagenawobib.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/piwesebo.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/ragafitaziniruluse.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb4ef3e53---29931054246.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/76957296702.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1c330ec1d233e6f04c302336708fd1b3/wisowi.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/gesisevimalarimigubajimuz.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/19955236430.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/bikovopemabumivax.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613659abc433a---49573240808.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/zizawimalun.pdfIn PDF document text
    • https://eventaipei.com/upload/files/kexasevikadululolu.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631605575.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090516211572.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/fimekosumamamaxevanuva.pdfIn PDF document text
    • http://webursitet.org/Files/file/pesuxalavuvijupo.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/80927459536.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/57612417188.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/46766741051.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/32059091194.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16142a005f3a1f---nomamas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=naruto+shippuden+171PDF 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_off0000d71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71A 10620 bytes
SHA-256: a36ff6ace031200e7b7b6aa236078b7ebc311e54634d0d2455fedb7736c82f23
font_01_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 19712 bytes
SHA-256: cb5c7d391f8b2d9f7ebae8b49fa949a0a516b40cd087c11fc96632a5f0ec5a97
font_02_sfnt_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1