Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9346ce7c3cde8e…

MALICIOUS

PDF

76.6 KB Created: 2021-09-20 22:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c3eb7d6881ba6ad32ba551a6cc10802 SHA-1: d2dfe93f06621be80ec9798f136d9e318a86df5c SHA-256: 8e9346ce7c3cde8ef870dda86afc6dc288cf054823452f9c7322813f054ae70e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a variety of domains, many of which are associated with compromised content management systems or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=uninstall+certificate+android
    • http://cistenivytahu.cz/upload/file/23361060444.pdf
    • https://sunnyrosesschool.com/userfiles/file/resuva.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a20af818ce---61177940883.pdf
    • http://webs123.com/userfiles/file/90169983571.pdf
    • http://bluebiz.kr/userData/board/file/56451525778.pdf
    • http://intemhathanh.com/img_duhoc/files/kigaji.pdf
    • http://gardensyellowcab.com/admin/images/file/zipirozelulu.pdf
    • http://dierenwinkelindex.nl/images/uploads/35412702930.pdf
    • http://motorlustor.net/userfiles/file/sotorez.pdf
    • http://labonscafe.com/userfiles/73531371586.pdf
    • http://dalaichau.com/files/65283084268.pdf
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/tubupulomenisawu.pdf
    • http://gsmontaggi.it/userfiles/files/fanumale.pdf
    • http://fractinvest.com/uploads/file/23246725826.pdf
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/75899244765.pdf
    • https://bellcera.60km.com/upload/files/54243312436.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323d8f67a3c---punetuzulevuleroralikuza.pdf
    • http://www.chubsorn.com/file/files/48238320333.pdf
    • https://noventa.cz/media/files/file/93027953680.pdf
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/linuzezurunax.pdf
    • https://xn--nmqu14inmf.com/upload/files/96856193722.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb9a5e4b7c---retavizadise.pdf
    • https://galerieportelouise.be/userfiles/files/63387246673.pdf
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/33159501482.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/76264638205.pdf
    • 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_off0000c596.bin
7b7696a74c53c7a0fec2b8e5ea89b2603574fbba21922bb4310cb795a2ae0722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC596 18060 bytes
font_01_sfnt_off0000f47f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 16792 bytes
font_02_sfnt_off00010c96.bin
a35603666c1d16619d15dd3bcddfb661d5378037e06b788cb990a5669c0831c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 10476 bytes

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