Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c2a980ac09d975…

MALICIOUS

PDF

68.4 KB Created: 2021-09-28 10:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f50e86361c60c2c283f2117d0cad199 SHA-1: 8096a336251023c5d0de217b5282795f8edc0049 SHA-256: 38c2a980ac09d975ead0550737cd83c9d94d00147f60a275dba060a4e93d8e0c
146 Risk Score

Malware Insights

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

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristic PDF_IMAGE_LURE indicates it's an image-only document with a clickable action, designed to trick users. Multiple unknown URLs are present, suggesting a potential download or redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dcoderesearch.com/uploads/39414663140.pdf
    • https://ambient-interier.cz/files/files/60400146732.pdf
    • https://halkapsikoloji.com/userfiles/file/70699954842.pdf
    • https://greenbins.ca/ckfinder/userfiles/files/74295452917.pdf
    • https://thebookonpersonaltransformation.com/FCKeditor/file/58365104521.pdf
    • http://studionegrelli.it/userfiles/files/12217642506.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614496d1c7e4d---77685752002.pdf
    • http://marasintl.com/public/ckfinderuploads/files/vazaxexewiwuliku.pdf
    • http://microsolder.hu/userfiles/files/fugesakijerupubun.pdf
    • https://triangle-electronics.com/assets/userfiles/file/74840449384.pdf
    • http://sinoscaform.com/upload/ckimg/files/202109120703083706.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/geferalobodabir.pdf
    • https://cuichi177.com/uploads/files/202109181500259070.pdf
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/voxudupipunimevovejidel.pdf
    • https://mr-alian.com/upload/ckfinder/files/toniwavusemutoriwapuj.pdf
    • http://sochi-riba.ru/ckfinder/userfiles/files/mamomuzejo.pdf
    • https://holcom-wd.com/webroot/img/files/84683056046.pdf
    • http://huabulaw.com/uploadpic/2021-9/file/2021092301530073499.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140c3d9db263---vebifasonosegotekipogu.pdf
    • http://ossokahve.com/upload/file/nepujapudesor.pdf
    • http://conblocmanado.com/pics/file/96017832991.pdf
    • http://podiummoda.ru/userfiles/file/33370730359.pdf
    • http://reafamily.lt/ckfinder/userfiles/files/19202215454.pdf
    • https://itscebu.com/upload/file/20210920085045.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+transfer+contents+from+android+to+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aedf.bin
23cb281b78a8b9d7434d97d6416238486de4474db95a26d62f04393bf00c42cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDF 13904 bytes
font_01_sfnt_off0000d157.bin
890c3eafc981a426cb21f45ff5b95625ea0d03da8240c632ecff9a67626ab931		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD157 10668 bytes
font_02_sfnt_off0000e9d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 16792 bytes

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