Malicious PDF — malware analysis report

Static analysis result for SHA-256 472e5f92c55831c7…

MALICIOUS

PDF

78.6 KB Created: 2021-09-03 23:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2c3047ccc7aa40592b7801670d8898d2 SHA-1: 6702290bb0e8acda192f734b0d56b04c827666ad SHA-256: 472e5f92c55831c7c39b1c44131a6e2ec0c0f18c193844ce4ec4e4d60d8c344c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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=baby+cloth+pattern+pdf PDF link annotation
    • https://girl0229960192.com/upload/users/files/xadar.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/95310815006.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rudisuwoxabanewined.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/34143228136.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/31d1b4c7acdebad465dc82a84a7be311/43090661978.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/44055034669.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/18715096509.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/11074549188.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ba847c25d4b---pogexuvatijumoribet.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2249d85bb3545f2c43f2fa15cd3693ae/86726997401.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609430b1b9a54---61284396973.pdfIn PDF document text
    • http://4bx.pl/public/file/4891910141.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/75396544285.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757d9f1fbe1---35272815438.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/13726661835.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b24f8a416c5c31f69478b737f6b9694a/giwimesewinipaviliton.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac38625bbb9---boxobabakivinikipiwaf.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/4401605888.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160944d7164462---88597110854.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/wobedozuvamuzofofapipovum.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/97238775289.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/zelivolilededipuvumutige.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_off0000d13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 16748 bytes
SHA-256: 8ea29d638c96818e226cfc777817fe112020233ad5cf5f02cdafe302467c391b
font_02_sfnt_off000114bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BD 10764 bytes
SHA-256: 860d836398e7052c8d1da16f7a354fddb5fc0f0185a9aa0ceb6f65a78f1e43d5

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