Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03fb2686ccf95de…

MALICIOUS

PDF

74.7 KB Created: 2021-09-04 21:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ebe3d7aafa65c9e457ec6b9af354110e SHA-1: 4afb577a39fc447baaf69b9c10316353b7944fff SHA-256: f03fb2686ccf95def6667369033b8cb415bbdbb62a745a81ab5ce0eee353ab09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=zoom+h5+instruction+manual PDF link annotation
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/97p893f9mogqj3hvh7a45387f7/sifaxa.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/54222774697.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b03fa18b17---2971101359.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/43807086077.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1hst8mq2nqinu98o7c83ci6k34/nefimakerepexoloduvup.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///rikep.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d62264b0a1287fcca6cdb8c4c386c276/wimuvelakenifowodeluvikiz.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8ec6f8b2---gowaxeropin.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/tewope.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/bexexefuferemanoxogujas.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/21285811090.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/lusiwino.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/38587862520.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210724002646.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/65373032889.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/53899a2b5457e371cf98d7f135fefd1a/74572108021.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/52226199085.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/94580579536.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a8e7bf245---99989374809.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119c4d4c6749---fisejifalixelemakado.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/cd158f09097d204a268e463b7dc5307d/71423955251.pdfIn PDF document text
    • http://poorclarescork.ie/images/lavegorezodifelusuxe.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/97108689191.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/52752f406a7d5a5149a38e088ee76584/42195847738.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/rotofurulunake.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_off0000c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 10560 bytes
SHA-256: 55dc3181b67fc5eb48f4a7ae26be77ec4090a897f707cc1553574bdafda9d80f
font_01_sfnt_off0000da0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0E 16728 bytes
SHA-256: 82e435a8adc2019505a88bebb3b7143294e1974252be9d6543dc1737fced4ea7
font_02_sfnt_off00010522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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