Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0661f65af7ffb45…

MALICIOUS

PDF

70.7 KB Created: 2021-06-23 10:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0dc0600b2f204be2725a01104df206f8 SHA-1: 94449a0e7175596e42e156c4e9fc2f979f5ec43e SHA-256: c0661f65af7ffb45aa6c99fdd408c12b2d762d8c69347955c2183df4e436b4b4
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and link farm heuristics point towards a phishing lure, likely to trick users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pistant.ru/uplcv?utm_term=love+and+respect+emerson+eggerichs+pdf PDF link annotation
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/af24a875d9e9393ceedae0d4c7afe277/28203302666.pdfIn PDF document text
    • http://sciattella.net/images/file/27018484392.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/pinemerodibizamumarefe.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c259ac900---18402679759.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4mt9ktdpsen19bec52thf25luj/nabesipujidimegemolaxot.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/liritopugewefolofabode.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pscom5l85usadf6iml7o0sgfr0/19394541057.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/notepasuralikevibonulub.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/25998351794.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bad99e1500---godeduwosatijoroxiz.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0521277c1a716be2a7dc554249f7b0a3/vavufudomoniwugavuni.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ef01e81dcd4d52a29712440339b776dc/kapoxejajumizolumoxolori.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a63bd756c89---28428550747.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/xapasorefepafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5536 bytes
SHA-256: 22fc6bed0353fec57be0802b0b29208eafc61c518be92728824424e410131c01
font_01_sfnt_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 10792 bytes
SHA-256: f21ce0cf2d65f4466b09ab6f6ef199d85681f1f1f0507aac91eb9e15c54cf79e

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