Malicious PDF — malware analysis report

Static analysis result for SHA-256 2226b8218c3e6632…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 04:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e0761070ba5495178f2a09d362465271 SHA-1: 6c43cc27e69e8783ddc558cdbeb8b6a6aaac92b2 SHA-256: 2226b8218c3e6632c429a122cbccf7d94723ca452c5624b552489c42566e8f8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and potentially malicious URLs disguised as software downloads. The presence of external URIs and link farms suggests an attempt to redirect users to phishing or malware distribution sites.

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://catamma.ru/uplcv?utm_term=drawboard+pdf+crack+windows+10 PDF link annotation
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1e2ee1290---sijisetaperut.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/25609339381.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/tugefesifokovove.pdfIn PDF document text
    • https://poker-fire.de/file/somubowapobo.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/nobededipefamugowapudo.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/masoxes.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/nelemulojifara.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/72921048004.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/wojapugubojewuwabi.pdfIn PDF document text
    • http://mrybalko.ru/files/57275169728.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/46890263810.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4du85g054kjhphkiqbl3dra1m3/fitogerofipububomar.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/28387607066.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/zavanufura.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9a7bb41aa---57296979152.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaed145f74---tuwoxamovamiji.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/70832067087.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/13171394629.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/23518204314.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/68289039119.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c62a3551f4c---sojofexajelafaxidejet.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/44332268680.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a56882b66ed3a030526ccd151e9452e2/21399048591.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f5a87a32---lurizotulu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160760a1678dfc---xepupotuz.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_off0000bd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD90 15968 bytes
SHA-256: ebf47e5bea876e086b0bbf4536d47d9a9fbde677a63fee0ee707fef340e16fe5
font_01_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000feff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFF 10832 bytes
SHA-256: 4fd22ac9b536b2ee483d29c0911bbcd5422df47e63eb82f4cc5254705f7aa3c6

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