Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fdc96ae829fc4e…

MALICIOUS

PDF

79.9 KB Created: 2021-09-11 02:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e8c765f37e5e4d6691bbf67c133da67d SHA-1: 24ebe5929adca2740d9cff902a36bc5efd26d539 SHA-256: 22fdc96ae829fc4ee7461c867fe4677a803352a2877ea09037a92b1307d92d1e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of external links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/80162492592.pdf In PDF document text
    • https://tefen67.com/userfiles/files/momasipoposigadupo.pdfIn PDF document text
    • http://princeverma.in/uploads/files/26374238865.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/makemujadepoborozuxuze.pdfIn PDF document text
    • http://www.polni.si/Images/files/35274888006.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/42807960223.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/74688863159.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/fejegosezukufat.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/15208310964.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/sekinezajagofawowize.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tixidetek.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ec38fd6f76dfac69fe84c489f48827d3/95497562340.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/zubikopegubabanufan.pdfIn PDF document text
    • http://halaljones.com/uploads/files/36363538693.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161319628dad88---82362746285.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161345c0781f63---mepotakujavudululalami.pdfIn PDF document text
    • http://prompol.com/media/file/9854849110.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b22b553d05---mubofud.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/petowixaxujijafobesubufi.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/bozazolibuzipekisipiwa.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c0661cab9791f84739b05c3bb6e016d7/xefexujowedig.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109110608277398.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/57568943458.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109030648251899.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/fozaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=iphone+vs+android+statsPDF 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_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 10460 bytes
SHA-256: 22bdc5f7f9ccc83500e043298d658d7168b26b68b9d79102d153d75ce076f06a
font_01_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 17188 bytes
SHA-256: 95ca3a1e6b2a8cad77e0bf4ececfa26738b3ad3b71163960dae6f801556eb706
font_02_sfnt_off00011a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1