Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dcc0c49c4a5cd6…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 18:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8baafba984d8141eead0d616f8fa5499 SHA-1: 43ce12e087fb2b863f7aefa5be0e43961ad57feb SHA-256: 32dcc0c49c4a5cd64ffc56518f7055d0814dd31e927b72a34ed88ea28b5c5d6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. This suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c28ed1e9---koloxil.pdf In PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e00ef17663---77215865517.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/69836837573.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/48765785060.pdfIn PDF document text
    • http://kajsanordstrom.com/userfiles/files/51557985133.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/osc536gpkp3gvg1njh24in0u95/7492401252.pdfIn PDF document text
    • http://elitacasa.it/images/file/zujexexajobufi.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/c53fee5218228bf3b3877f1a572cc9d1/52416559297.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/lorepodum.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/drb45eq3f3m3bsh4ca0rv9vlh7/52613397741.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/2419377795.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/xijumolanexodusik.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/bc681065b197493eb994190ffcd5be71/fokirepubige.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5ac9d1ded---67085044511.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/tijawegaripofumiboja.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c51267956e1ef34e0378fe6b43acbe00/91338124619.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c096feaf5a2ca737fcf1751385e6d1a1/dugijujo.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/ponogelolitojobegurimabo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/33bbeaf97e98c486dea49cb919d28969/99427509837.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ece630a43eba7686fa4d915f1856fc01/5652315995.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082601a8dd56---49530276378.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/9crodatkq21d22m3oji30525hn/nusulo.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/xolosibefibanegurerobada.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/16905448137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=autostart+remote+starter+manual+transmissionPDF link annotation
    • 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_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 10352 bytes
SHA-256: 6d38405dbeef2e575b87c29f9074117cccf0d4be850d46625209622b1296e9a6
font_01_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 17232 bytes
SHA-256: 897e0ba463949c1a28a21a9cf64a6328956c05bdae05728c68b806c88a37e881
font_02_sfnt_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1