Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f736b1c5b9a984f…

MALICIOUS

PDF

80.3 KB Created: 2021-09-08 02:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9c64ed5b62caa8f3153366513a550435 SHA-1: b878922f1553e0b60deaa51bbb64979c86536372 SHA-256: 9f736b1c5b9a984f4ba6f29c10f358e2c0ccc99bf1558add51ad5b404d1c7a10
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://aradovan.com/userfiles/file/68638040958.pdf In PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e490c1ba---tupigusawulewefalumaja.pdfIn PDF document text
    • http://weeb.nu/userfiles/file/wananilefiguzajejepak.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/wumelimijebawiwinil.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/44538958345.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/65591243647.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/52425929917.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/1e771a0c02e4888e586ea0f1ce6859b7/powazalameberumazojebeka.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afac1658ad0---zubunivebujimufiwo.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/94463877425.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/firogalabat.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/monabivawovakinexe.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160729c7183dd3---96434195717.pdfIn PDF document text
    • http://jp-cable.com/d/files/86221727735.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/70293747037.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/17r1um4fslsdtkm611stne7o1q/zusudapitenomedix.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161030db600692---70580939999.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/7295587595.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///tepusuzidowu.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/15951500459.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/120e27494fdefc8a77a67ac86b317e3e/fadonotaporowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ordering+numbers+1-50+worksheetPDF link annotation
    • 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_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 11272 bytes
SHA-256: bf38344bafcf116040c7eee047bf99caa56d525a433a0ad4f5d635546ee3b18b
font_02_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 16204 bytes
SHA-256: 17756f679e7484532cc759fcc0f8181340bcbf12035b11d89178d1b8444f1570

Open this report in the interactive analyzer, or submit your own file for analysis.