Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b56943f835efe6…

MALICIOUS

PDF

76.7 KB Created: 2021-09-08 00:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 61fd42e5fab800053ecd5afb12d54917 SHA-1: 643947555284d80856ee61c09ca07b12aac8516a SHA-256: 46b56943f835efe6a3f6491d1948f35467ba8c90102b29880408f43e6c472aa3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or serves a malicious purpose. The document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of external URIs and the nature of the links strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://garglob.ru/uplcv?utm_term=askep+gadar+fraktur+pdf PDF link annotation
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6f9cbf0c9---99000187820.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/xijizitosanofezoposevuxor.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/45070302547.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d1ea63a66aeed96d7d1b65cb19b6990b/4504003839.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///paxabelogetefepikeri.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2dc1407f9---28010758042.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/68397775605.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/85063211861.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/setolafaxo.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/55873319368.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/22129789199259b30a0f9c5c9950ab67/16189407078.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/pufomejifigaranub.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/31313200171.pdfIn PDF document text
    • http://mesahighclassof63.com/clients/79820/File/64441966040.pdfIn PDF document text
    • http://jarosi.hu/files/file/19760851398.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/20281005885.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210809_8EE1279179C79D61.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a4e10fd9d---50399298498.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caad919ace---pozodudizenofenazepowim.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16119671f0e443---67092456474.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/nobekufonaz.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/erhbpvuutpsu50mct39dfu0b46/lanekomo.pdfIn PDF document text
    • 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_off0000c9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EB 10484 bytes
SHA-256: ea6d6fb315f5265c1d97c48e7fb467641de18402852f9a6cca385e3dd0002f4f
font_01_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 16892 bytes
SHA-256: 1d89825e14932c5c52c0e7e4a713dd79103a6bac5ee0ccc3998acd0bf7c1ff73
font_02_sfnt_off00010d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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