Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e9c0339de47818…

MALICIOUS

PDF

87.9 KB Created: 2021-09-08 12:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c965c75f0890b9d67747fb43eaa5703d SHA-1: 69f6c19c51e59538997de0df6b06a0bab45d52a3 SHA-256: 75e9c0339de47818e7ab26ea5671020d1d960e6b20d0b956966c3f358e36b502
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users to these external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crysiq.ru/uplcv?utm_term=picadora+manual+de+vegetales PDF link annotation
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0aa868c96---galametazobajevu.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/gedorixobutapax.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/sonekemamuxofadefosep.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/xonazewuvepusamakod.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522ec79eeb---3648421034.pdfIn PDF document text
    • http://tj-1970-50yr.com/clients/e/e8/e8fccb6fb94f20b6ca4375945b3939e1/File/dezinumotogeg.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2a7b1dbb---97442266924.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/64590074386.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/29629178226.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c131706a52e---tilarurovutumenitopomilu.pdfIn PDF document text
    • http://splogservice.ru/content/files/22684738272.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa99e1f20e---59374096628.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/227876284.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/78997214665.pdfIn PDF document text
    • https://lasanisports.com/files/vasazijovifefof.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109020943148539.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ni0e8kior7gd0adcu35g2kocea/pegarisojif.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/51875296928.pdfIn PDF document text
    • https://hse.tw/upload/file/kebarefilimelug.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/jepovem.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/zoliribawige.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b68fc94bdb2---93141412851.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/5dbd76b9ef8ec72847ceee23edc63f16/5528270417.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/43126026818.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_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 19132 bytes
SHA-256: 27878ee651a37bbc13dd7b2b1627701a0ac5f9843d00dd90bd77a306fa5ac6eb
font_01_sfnt_off000120eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EB 10880 bytes
SHA-256: 761f78e16ec9d67e3c9163f4027e80a49ff8e4e350c76f64a7b519eab2538c49
font_02_sfnt_off000139e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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