Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d451399e98c332f…

MALICIOUS

PDF

228.4 KB Created: 2021-06-12 09:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9637c3e3c025b35a351e6fdadbacae18 SHA-1: 377ffbb7e44fab8bcdeec41570b6e9b9ae4316fb SHA-256: 0d451399e98c332f0887f0bd6344c3640e95e00dc7a00a6db57caa392e3d84f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The primary external URL observed is https://garglob.ru/uplcv.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=killing+joke+discography PDF link annotation
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca410fcbe---44878259058.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/65018942031.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/munigebofexujelalaruvetag.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715e8202d6a---lonujuwubamaxunobosidur.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/bed439457de070fe1bc56b02254cefa1/15379443281.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/993fe0abb388ba622b4069313214bddc/62865863713.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608c885637efb---walumewa.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b70add77e0---fedoxoserevegavuwazaj.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085caff4b74c---dafodidazirinok.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfdab8ba2d---92517438770.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/gtm9cdjpqctp32btkrlt731dc0/35059933228.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/67382427550.pdfIn PDF document text
    • http://stattus.com/assets/file/39428304847.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
    • 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_off00033220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33220 5548 bytes
SHA-256: b8d9b135422b200d135cea0c8eeee8631f3cc015d93b2cdef3e1e317fe08bd51
font_01_sfnt_off00034508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34508 12164 bytes
SHA-256: 34d088bfedd8b223925a3d9e55fc0de62ca652d90e46292ffc69efd8a63c6d46
font_02_sfnt_off00036ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36EA5 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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