Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad0cf67be2bb749…

MALICIOUS

PDF

78.9 KB Created: 2021-09-12 13:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54202392f504502175807628b16a62ea SHA-1: 8f7d56f3d5c86b3cef02910f7766eb5b71397133 SHA-256: dad0cf67be2bb749a70562bd17b569c7186a212e0a0b31311a4344943570ef86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://philabc.ru/uplcv?utm_term=mektoub+my+love+canto+uno+full+movie+online PDF link annotation
    • http://gruaszarate.com/ckfinder/userfiles/files/82089501903.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/lexudaxivu.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/20142670657.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/puxobus.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/77908991959.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/19421851467.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/fd48480ca9716becae34b1a957bb5976/jikatabiwutaririv.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xozuxuf.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/rabipanuxojosujeli.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161318a6111b89---nokavuzigipujokipofosawuf.pdfIn PDF document text
    • http://sun-tes.ru/files/file/41260933531.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/fazopiwom.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/11778203083.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/xavura.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/wipukamoxadirufikev.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/sajoken.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210912122722.pdfIn PDF document text
    • http://eternoohydro.com/d/files/pifateludaxerapimidi.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/rupasazutibidaf.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/6927453945.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16135e79489eaf---41902118635.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/2add47244634bd369e160a567f82a06d/40463038607.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_off0000c41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41C 22008 bytes
SHA-256: 8ba69647b67db2657eeb776eafde769eda7b571aff3d8a791a3658590ccb6252
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001150d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 10736 bytes
SHA-256: 42bbfb6c020c2720b0a8e344859feba8306146d15bf925cd7cd5338c84f610f8