Malicious PDF — malware analysis report

Static analysis result for SHA-256 1382847b0d358c08…

MALICIOUS

PDF

75.9 KB Created: 2021-06-23 04:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cebe8c9d307c99b3f8d2e20756cafdd SHA-1: 42d12741d8d79d2f11b5acad516341a729d45b29 SHA-256: 1382847b0d358c081501de0a655b98a4260d548f359fdf1f69fa11fc6c4ea0f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the presence of external URIs and compromised CMS upload links points to a likely attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=traction+drives+pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718fd3615fa---zepimipazapi.pdf
    • http://recrute.fr/files/files/wumewafon.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/00243095cbdd935e8efabf3693eba3ab/revudebekolazi.pdf
    • https://jordanadams.com/ckfinder/userfiles/files/kasoguwekefupoz.pdf
    • https://ascinfratech.com/clientprojects/trading/file/87789032950.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/06d7bc2e48e0e4e1013f6034aeec7c6b/jusowivojezexemefu.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f3350ab6a---konuvepojunax.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbba4f06df0---bapumimusezedatenabizu.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607925aca4a6e---fidinazubizosej.pdf
    • https://vestol.bg/files/file/vexojagasobowuvo.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a307b17a7f06577a497ef92d02977078/45638598692.pdf
    • http://mariamozharova.ru/uploads/files/zifawaziwesosunar.pdf
    • http://train-in-japan.com/images/blog//file/70333712542.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8cabf3d0f---vapuxide.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c750bd7952---vojikop.pdf
    • http://palami.by/images/file/faluwajolapa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ecaec076---gagomaxidikekusi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8e.bin
e6c6609e37c28e5a3938b6183acf31991588ecc3eea8ac6139b1d124b1c44c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5128 bytes
font_01_sfnt_off0000ff12.bin
a5419be80514e643f1cadca070fd4898c2f3c9d096fe2706bdfdb6cdba81454b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 10448 bytes

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