Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0972ef2e933097d…

MALICIOUS

PDF

92.0 KB Created: 2021-09-07 07:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 99f4655c92fd4c385f629dae1a2ba841 SHA-1: 7bde52ae23aca28ed7b4b5e9a87ed915388b382b SHA-256: f0972ef2e933097d721f2be39d73f0a079c4da0c48a7b4ce40a2022e68d3cefd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads, suggests it is designed to redirect users to malicious sites. The file's structure and numerous links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://ketchas.ru/uplcv?utm_term=amadeus+manual+pricing PDF link annotation
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7e56c29b989420ae29ce6e7378aac5e6/62460307937.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/wijejarekimebiraraloxewig.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b51a85e087---surimidilaraba.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sdmud55sohpaq9a6qg1hehj2g0/jogibenutazipexeremone.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/jevitokagejarikanotax.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/sijazedido.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/tafivamuxemexenukom.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/es6ndmcvrbq32aikjnd81l50me/18525755849.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/zarofasesemavad.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3ff303c2---gimifujiwiwuxelo.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/zonoluputezaj.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/10a6513683d2425edbb7dac3dc7d3883/84307390188.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d57c333aa0f37db1587cf8afbc8f8660/18892189616.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999df5098ba---35505179187.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/8399727510.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/maxuxeva.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/kenenep.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/sogutofalutopimosudofizu.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/76966683509.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6dae5883---94216233267.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/m9r02su5s8qspmgmbqs27h1fi5/fifowotesidukojujevutawus.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/1602071906.pdfIn PDF document text
    • http://hanifeugur.com/image/files/xadujowuzubexasez.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 10720 bytes
SHA-256: beb854e4a8a077d1ef3512b01ddbdcef033bf5c885e1ac15c2b2013533977f49
font_02_sfnt_off00013033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13033 18736 bytes
SHA-256: db55c4b4742fb623045a05d9854b7bb7d046fb25c0a63ce29196b23664e8a7bb

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