Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d73e2b3452e15df…

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 10:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 43fb2ae64bc9551d63a68c442ea49b4d SHA-1: 412b7a85a6e9c53e840c6a9defd95d7fe8e4d606 SHA-256: 7d73e2b3452e15df32e04b31d762588d842145dc6b144d0b56865ec3e552c991
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=driving+licence+test+symbols+pdf PDF link annotation
    • https://bishopsalamatkhokhar.org/userfiles/file/71881070753.pdfIn PDF document text
    • http://accronline.com/userfiles/file/49612353732.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/64e985ce0cd6ed0e5b4b2fab6e39eea8.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/rotexitozokojomofa.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/02evm1h1826l2si80ehjf4f7l4/7069096215.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/54367278524.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a68c2a45fea---82393523021.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/josomixugavamakudukimiwoz.pdfIn PDF document text
    • https://telorgabus.com/contents//files/lipizuduvodagun.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/maxaxe.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/lefakugoweganuravapanire.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a231733fba9---jularerizazewarisefuve.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/dadigejuwewupavosikalawu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba15ecba64---danapibamurixamoreb.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/puligogifofilarufewit.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161266850a973b---28894389773.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50d3e832ea---jonuxipedisad.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/zisasamezetagilux.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3047c0e4c0---kivisiwat.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/39821782371.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/xufurosulumakizofe.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/366fd669403c170dfff4f29dc989d349/35779667664.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e130b69870cef6c7bafe0f5dbabc5279/jipebakotisido.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_off0000cc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9D 16980 bytes
SHA-256: db34178f2fc9c40dbaf153777e132c1df2b9ce8749f5c2ca49570fcda7328ec0
font_01_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 11124 bytes
SHA-256: a7ce3add36fb79b49ce2d52eeb347e877c39783d4a7b12f861fdec99a5f1d828
font_02_sfnt_off000111dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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