Malicious PDF — malware analysis report

Static analysis result for SHA-256 073d2a6816836f2d…

MALICIOUS

PDF

78.9 KB Created: 2021-09-18 23:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79f7b2e2505c1943a051eb1abd8da1a5 SHA-1: 03bce307aacfeb12fa399ca67d86ab75b51975d1 SHA-256: 073d2a6816836f2d7d114e2fdcefe947aab4f6a9596e25095c1fe04ae30a96ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://dieterheich.de/images/uploads/file/dawelesunogafesutarogup.pdf
    • http://omni-links.com/images/blog/file/84492093010.pdf
    • http://shijijiaming.cn/filespath/files/20210904215412.pdf
    • https://giriconsultancy.com/content_files/files/faloz.pdf
    • https://kovtec.pl/eurostyl/photos/file/28726312608.pdf
    • http://bearings-home.com/userfiles/file/mewotodej.pdf
    • http://avandcie-energy.com/ckfinder/userfiles/files/49144792096.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161427a40acd06---62869044020.pdf
    • http://carbonelite.ru/file/kafoxixuruzaxuwapivadoz.pdf
    • http://sanarina.de/ckfinder/userfiles/files/vodekofixesegawon.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4b82a6ae2c282ea7af95e9687c1b9cb1/2920671329.pdf
    • http://makesomenoise.hu/upload/file/20379119801.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/23d6966bdc539ffee9f0f4c5671799dd/34936075679.pdf
    • http://euromarkcreations.com/new/fck_img/file/33750563409.pdf
    • https://copacndg.com/images/uploads/files/84932876474.pdf
    • https://afra24.com/basefile/afra24/files/vewavuvekonan.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0b206f6f---7523620477.pdf
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/61120462183.pdf
    • https://aordonez.com/images/contenidos/files/23303776893.pdf
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/lowiwit.pdf
    • https://whitepalacegrill.com/userfiles/23513779626.pdf
    • https://kanat.com/upload/ckfinder/files/tedilukajibemakibaved.pdf
    • http://robvancampen.nl/userfiles/file/48755760651.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0e23j3284pqhu15n0dm1ttk9n3/28052871116.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+v+beta+version+by+techno+gamerz
    • 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_off0000c79c.bin
71866e0402ffcd62621aad968f10135473446f0e45ce933836ad436b87ff6f15
pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 19268 bytes
font_01_sfnt_off0000fa6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 16792 bytes
font_02_sfnt_off00011283.bin
69212f9e2847c772e9908dbc6525e5b8d6cc714821ae8f73451feb25aae1663b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11283 11048 bytes