Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb1e40496bf506a…

MALICIOUS

PDF

89.2 KB Created: 2021-06-13 01:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 97b23ac2bae0f7e641e65cb930244c18 SHA-1: d69510af60212da65ddb3158ec6c0367cbd8f72f SHA-256: bbb1e40496bf506a3978d8fec87ceffdd099bc74be3e4febde2d3c1b388ffd33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm, likely designed to redirect users to phishing sites or download further malware. The presence of embedded URLs and the nature of the heuristics suggest it is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ketchas.ru/uplcv?utm_term=fallout+new+vegas+gun+runners+challenges PDF link annotation
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/vugjpdqpfknc290rrd9cij7ntb/72667210519.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/levevoloxesinomapesur.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/5gdbtrf8pscel1no3sbv2ms7tv/84525954748.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/52rcqsj8fltifd0p8vud77omrl/32748007971.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/26e658cb1f36a9863b9ad0d2c73a69fa/lunizasidiguderoweriz.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ab429434c3fe3804379fc523a0a4aae7/30033565116.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/9cb7ccfe62c718b33cfb5ff1fd0c93a1/69344794815.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/46801751491.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/xikotuwonobijuwigezorosi.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37de3c972---jalowaragixixi.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607efbc9043ab---88846009369.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-9/20210509131500230808.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/76698307195.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51d77205e---17847268039.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/59654846296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 3080 bytes
SHA-256: 8574919c7c8a9f024103958ce015253c5a24b8e646cdb5f787658918713f2b2b
font_01_sfnt_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 5168 bytes
SHA-256: 2984b507bf68d9577b85e48d32a985c93f55160aeb392e91bbe9c040c2356e17
font_02_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 17364 bytes
SHA-256: 29c2eae9f6ced252afad4ce5a12697e035e9d2f9661da788fba177d8845c195c
font_03_sfnt_off00014060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14060 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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