Malicious PDF — malware analysis report

Static analysis result for SHA-256 de568c8784cc1206…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 03:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f024dc7fcf1317fcaa967893d183b45b SHA-1: ec69ba69f670ddad975e0b81761b52219e3c7b69 SHA-256: de568c8784cc1206c510ef5b604ab4539b729befa28c4224d8129aed56cc2487
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://inwebjor.ru/uplcv?utm_term=hydrogen+peroxide+pure+substance+or+mixture
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab22fcae86---mumamemixejuxizazexe.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1sjucubrr6vhplv9vdj3eo32pl/6953925704.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/30856459516.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/97580841632.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15c91df2d6---kabewedefus.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/i4i57b5iou7vd9e3p3gqtm9407/vegunediviwun.pdf
    • http://hzjksj.com/images/upload/File/46646059910.pdf
    • http://baugeraeteverleih.de/benutzerdateien/9278534959.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d7b31dcfd---vozebativezoveloguv.pdf
    • https://beliangka.com/contents//files/palifanutodad.pdf
    • http://sahamit.net/userfiles/file/lipirubujekavewoliwu.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9aeieomjp3eeir1ckhsriaticg/dipolosizunulipozesi.pdf
    • http://aggengr.com/uploads/CMS/file/bivowogudisoxovona.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bae9830d13---46613843339.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/03c6afc5ed607a76ebef1e515a68e789/4012990857.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ce074a7a---relir.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/bb03605bc1a44205969c195f8b0d464a/girevozezasazubimupu.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b346773600---datelojopekegi.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/0513haf572piifgan2fjnbtj24/satuxefo.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/he4a51crucqv3vnep9rvvg3q30/sogumagumoxuwasukosoxebu.pdf
    • http://www.aqsclimited.com/EditorImages/file/govexokutu.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0527374707---44211292457.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 16792 bytes
font_01_sfnt_off000105ec.bin
a25781f3d02471776d34ab725ec163e6b1f06c75c6f6fc941443b9ce3141b6a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 16572 bytes
font_02_sfnt_off000130d4.bin
7cda971bbaf62d5c91540af6d7bab08b9b0d19ae0bfdc7342f4d539b020fb73f
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D4 11260 bytes