Malicious PDF — malware analysis report

Static analysis result for SHA-256 003b948c863e62dd…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 13:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 1eb19d4cc0b1da1574784bad523fe590 SHA-1: e98e2769fa1ad6373090e759ab68b9281308c261 SHA-256: 003b948c863e62dd61f9be1366309571e2be93be985c5a0c86fc725ecbd45465
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure as a link farm is a common tactic for distributing malicious payloads or redirecting users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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=changer+pdf+en+ligne PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cda65a83d---pizeb.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/dupilafevawekilavu.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/gedarisinujimirulurodoven.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb45651fc4---xogutaweret.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/tonabiv.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b363dc2df74---buzatifurim.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/87ddc7ec74a4dbe8791606e89d9df26b/bipaxisanomemigu.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/nupekeforaparatife.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe1634c3f8---15915978997.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b42cb7ea5d3---89445481747.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/15251684171.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/vubamumejab.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087941758eb3---96417764594.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/92055497695.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161260f2fe3465---diwesesidir.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/muleguxixujo.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc16555664---tifuponafasiluxuwojasib.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/83623551537.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/rerusinenavimegevitutukeb.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f1ebf14d3---sojenifela.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/zoxiku.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a83e0532---48095864761.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/19189795803.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_off0000cff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 10424 bytes
SHA-256: 40a4140cebb26e1f6e87fe152fbdb30bd26fdebb164cb8d25f67207815aac9d1
font_02_sfnt_off0000ff53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF53 18940 bytes
SHA-256: 392ec486fbf5e129bbb96609f52371bcbf28ee36bcd32ef614ffde974e366f8f

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