Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe26bf7e59a61cd…

MALICIOUS

PDF

88.6 KB Created: 2021-09-07 12:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 656bf201f9c75c371cb1bf3b53071d9c SHA-1: 6f923342fd46feb20aee1b2ff94fbe79b8a75304 SHA-256: cbe26bf7e59a61cd8eaab77ce1f4a00e87c97bb3f4be486caae9d6d48387999e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of multiple compromised CMS upload links further indicates a malicious intent to host and distribute further payloads or phishing content.

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://inwebjor.ru/uplcv?utm_term=spektrum+dx6i+manual+pdf PDF link annotation
    • https://panificioilcavaliere.it/userfiles/files/34277501073.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/96437781440.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/750c6c943cd3ef65355eaab036af53e5/41227691390.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/69306768580.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/xozegojuselajo.pdfIn PDF document text
    • https://moolans.com/uploads/files/dasekirezovelomelo.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/86980625731.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5105eb9a4451fbb2428539019c57cdb6/7883941913.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9c1a551b---televodosesujet.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/70168307503.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/3560094673.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/faziforujido.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/37024456430.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/5601294675.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f96fb5b41---samojidotezeketivu.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d99680b329d44934876871b2b37254f/61147472362.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/114fb7e16ab45492c9b2d05051c7b714/zubilepesowamizuvex.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/1hii6kma1n20fa4bh82hgrjg27/79035892405.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/17020881255.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021523057486628.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/61904171139.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e24510963de---9560339510.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/2p49vkbnr4d1oto6e59juuk5bd71tgdo/gimolakovozip.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/b3ec937779d928c7c83ef858b87376f1/58301085660.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/dovebusikijud.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_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 10908 bytes
SHA-256: d0c9e6f2111fbaad1ae385115490ae226a0a41db0bcba3f6e6cbfd90586f4ff3
font_01_sfnt_off00010a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A06 18468 bytes
SHA-256: 2fc0d2e7e8978df89f7df810c32fbdacaf9dd20523b713f1b8aa740def641344
font_02_sfnt_off00013aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1