Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fd20162a21a076…

MALICIOUS

PDF

89.4 KB Created: 2021-07-07 01:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dac603b93d47a8233a9bbf3e92d9fb1 SHA-1: a2ce90542c88e0f3a227d5075feca24804d176bf SHA-256: 22fd20162a21a076f902fef99ae501f375c49e29cc03832e74ca3aa7468d44ad
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The presence of embedded JavaScript and the ML classifier's high confidence score indicate malicious intent. The primary goal appears to be delivering a second-stage payload via a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/orkapqn3phinaq3tuhe0u4o8i1/93879052377.pdf
    • http://tsutae-f.com/js/upload/files/patodevateden.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f88c1b85ace73f5afd5376b5f4576bb7/65611461954.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/12476017191.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/41e219fc62f159a94b56ad036e3606e2/61525156760.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c3aaaa86---79619758002.pdf
    • http://jrpst.pl/userfiles/file/5947152827.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96bc71b4f---kovaserivip.pdf
    • http://nomaquito-travel.com/editor-images/jujofow.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08ba28fb8c---wokutu.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/46ei6jn1tlhh8klhf98tc55edu/62594372930.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071496e05e31---xulefexino.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/fc8afc21d2a638b42ae4a3e5c1afefc0/kilaxatiguwiwezebowufap.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6f1d8bcd5---wekolububoganu.pdf
    • http://chothuethietbi.info/img/files/7239865613.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07d71af6e---zegogetano.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d1f45030edaa0426085adfaeb06e08c6/getepafupajemuvejobiv.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3a408cfb876eaec5cb0edd0e3d207cab/45087719729.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512173726318719.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3fcb220c5---mopizudutufezoparazulot.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/r02sk68r17s2c8sqg1ah79cpfa/12999613977.pdf
    • http://ecotrans.vn/upload/userfiles/files/53681153100.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/92iegmk8l6qbgaom5ubhpobvdt/navogusuziwaneb.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc787fa37---bovupovij.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5c7fb689384f33f3cd837672e5ec34aa/59262634310.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mail+phci+org
    • 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_off0000fcde.bin
292c709228a139c87544ce4ddb9baeb32a75ececcacc3eff11fa26be19ca18ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 17100 bytes
font_01_sfnt_off00012983.bin
9bb192486ff1b052fe51ab2afccfef6d4bfe03e490dbf5e153a985374b9a8944
pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 10144 bytes
font_02_sfnt_off00014046.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14046 16792 bytes