Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca0cbe59a5ffd05…

MALICIOUS

PDF

83.3 KB Created: 2021-08-30 03:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 481bef6ec6b34efb207c4db1c3758496 SHA-1: 476d0c7ca2ff6bba70fe960cece33a847cb21f9a SHA-256: 0ca0cbe59a5ffd05e0b7cc1b0598e8df5ac556f2ac13fc8b0df8f3e567801fe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=wing+dressage+and+jumping PDF link annotation
    • http://abogarestudio.com/userfiles/file/venuwubitabuxopotixewuw.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/fefajonilige.pdfIn PDF document text
    • https://85097781.com/upload/files/deduzufafejamozegamixo.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/dijifema.pdfIn PDF document text
    • http://1careglobal.com/upload/files/39107412164.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/misexewo.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487698532d---35764729641.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/27632944829.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fbd8adf63---67962538363.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/xabatalovaxo.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/92209440588.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087cf358e51c---xuteniru.pdfIn PDF document text
    • https://sadex.pl/fck/file/35777318480.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/5hf59qasa7s8s2b520g9i8ir4b/66393975766.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/ranikorirasaxep.pdfIn PDF document text
    • http://flirdining.com/uploads/files/fipurutukosovi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/15452183537.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/8h6n33hig67p66tafho806hc23/tosaxepow.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/78627805018.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/nepuvoxavesuxogavepos.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ca8cbedcf5591c233939a21e1b28f9a4/patemuwumow.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6bdf58a76---97330926167.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_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 18460 bytes
SHA-256: f720b32ace0191d360183b7f54e72f8862df9a4e45e712367987a37a6bb0f694
font_01_sfnt_off00010f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F04 10692 bytes
SHA-256: 5a36b492e0e7c85bb50641d6c74e5216219717318c816790485fc785f4442fc1
font_02_sfnt_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.