Malicious PDF — malware analysis report

Static analysis result for SHA-256 1324a86117e23379…

MALICIOUS

PDF

68.6 KB Created: 2021-09-27 21:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 669e40afd8668c2273ec9c8a5d0c3b5a SHA-1: d7dd3405e4a1ece476ff5bbc74f636c3dbd891f7 SHA-256: 1324a86117e23379d5a800aa7c9bb02c738bc144ba26cf713d86deb3603c24bb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various domains, many of which are flagged as link farms on potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://irlanc.ru/uplcv?utm_term=voice+changer+while+talking
    • http://softwarefactory.nl/images/file/duwowusamogamekiju.pdf
    • http://goldenstarhotel.vn/images/uploads/files/kurugenegovosaledijikoke.pdf
    • https://cincia.ro/ckfinder/userfiles/files/wopovadotofatigadaneb.pdf
    • https://mk-sito.it/uploads/file/besesarito.pdf
    • http://cocoal.com/uploads/file/sapug.pdf
    • http://corporatiegids.nl/uploads/files/84502426257.pdf
    • http://chugguwang.com/files/fckeditor/file/4402835679.pdf
    • http://peaceinsrilanka.lk/userfiles/file/17502792576.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdd0481485---61436084958.pdf
    • http://vipnovini.bg/root/f/uploads/files/40907730960.pdf
    • http://mim2010.ru/userfiles/file/59893104578.pdf
    • https://avigailpekelman.com/sites/default/files/file/21493348989.pdf
    • http://articolo17.it/siti/usr/foto/files/vulomudamimodipu.pdf
    • https://ceccarmaramures.ro/userfiles/file/28275613441.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1ff1167dca5174a7a0e2310f555b8b48/rolafitexigubo.pdf
    • http://kiajihlava.cz/UserFiles/File/vetibuluja.pdf
    • http://lgassociates.in/uploads/27403199565.pdf
    • http://sintellect.ru/Repository/file/wefiguvolifa.pdf
    • http://pathtojanna.com/userfiles/files/kawifuxeresejuxesusu.pdf
    • http://hanleyresources.com/images/62112886622.pdf
    • http://eakqshop.com/ckfinder/images_store/files/76343645640.pdf
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/puzifizefatavupesabisixud.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/bcd9e4e7907f7580b7c52ebc5cfefbea/90688629846.pdf
    • https://duel.pl/userfiles/file/domivujujuvubumerevamafer.pdf
    • http://ativn.com/upload/file/pifeganopume.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_off0000b059.bin
5df020a2a6c8d7d02c0ff4bb362b6d6987beb2cdae35fe6f117c11d352bbe40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB059 10488 bytes
font_01_sfnt_off0000c838.bin
cdecb9b3e64973d60dabac180210c0a463a4cf7dd15dca682966003b506ecf87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC838 14672 bytes
font_02_sfnt_off0000ed12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 16792 bytes

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