Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe3422b102a9377…

MALICIOUS

PDF

86.5 KB Created: 2021-07-09 06:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c53b882b4d13d3dbc4f29f8548e2f1fe SHA-1: 700b8fe6b1327f0e52295c34e49ac7b67fb2fc56 SHA-256: cbe3422b102a937769e669d0b2e66b1e8aacb1af22e434158ba37e9b978d9570
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised WordPress sites, suggesting an attempt to distribute malicious content or phishing lures. No scripts were extracted, but the PDF structure and link farm nature are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f061de230c---mubikitadove.pdf In PDF document text
    • http://wisdomtours.net/upload/file/31139909467.pdfIn PDF document text
    • https://visualarchive.bg/files/bogikijulizeginivime.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5315b5422ffca6398bf9fd4c33070fb7/27271443472.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb54fca7e30a94666a14a68b0baa31a8/fukeli.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098b61240de2---55656605653.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/72090170545.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/zubofuvap.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/fotonikenun.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/d71ltn7laikkiv9krfmc23mcf1/11976193820.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f04aca0d4469826ccae9cffc476336e1/kazosubedugetukunaseduze.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a3f946089aae17e01802835a77b9d8ee/bodetux.pdfIn PDF document text
    • https://efnnma.org/files/file/noxutovalodiget.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/42971162978.pdfIn PDF document text
    • https://auto826.com/uploads/files/rusipowi.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609de622bcc4f---vadaremesukenemomej.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab614ff13a9---kobelomonusedevadirulu.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/15025314687.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160884e43bc867---watozokenazat.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/4573782995.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/27378651173.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/fidujivawad.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/19hc3fbum5oi5kqllb8pbtjps6/rezelekagukokexovekupebax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+craft+composter+1.16PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 17424 bytes
SHA-256: baef92aa58d96f02aed04ad1853150d762160301fef4736dfcaf9e51e51ad76f
font_01_sfnt_off00011bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 10760 bytes
SHA-256: 4aac32cf0189e70b02bf35c0f79dfeece5672439f2d48a3b9df149450219484f
font_02_sfnt_off000134ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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