Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d107abfdefac80b…

MALICIOUS

PDF

83.5 KB Created: 2021-07-13 17:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9efdd505e76178caa9b7ebb3a4d877c2 SHA-1: d669211e98f6163cec90c0314ea1703fcfa26eba SHA-256: 6d107abfdefac80bbb8566c78f26bac1abe75ff26b637616959b026e97335d38
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and link farm characteristics are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://bawaconstructions.com/editorData/file/97790735896.pdf In PDF document text
    • http://global-insurance-broker.de/downloads/dikesuwajigunimuwuw.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/tinarup.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecc2e1bc9f---bumiwobutararorajipifuka.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a056757d121---37277795443.pdfIn PDF document text
    • http://skncn.com/u/files/ruzizak.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/sobisawigafebuvo.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/susuvepuzuluvekewaxugore.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/94901350485.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/88075183112.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/50a9245319bba7ae166794643d6334e5/ramatufakivil.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c483daa38c---94828445336.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e619c96c8---sujedepininura.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/febijinologoriremuguk.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/bojukumovobekupurofiduw.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/nokegawoj.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/faef7b4af8f73438ecaaefe61236c1ea/26332368661.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/jetukizi.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/87476b9bec32c5657967c38e99568f35/42435138312.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/0f6d8b45d4b0ae7455cd5d90fb0055a6/29237712522.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/2kd34fclj547fmk3oskr6p4912/24115508228.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/nogetakogavuxivekopif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=canfield+solitaire+rulesPDF 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_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 16844 bytes
SHA-256: 2646b9939ab29a6bbf75831b9c1ae443e97fd327d0d2f65eb0b8f29288483874
font_02_sfnt_off00012929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12929 10476 bytes
SHA-256: 0f66923aacff7d6f70a789d64c8d4e03cd095e0e37678df6b0d0dfeb0b5bbe72

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