Malicious PDF — malware analysis report

Static analysis result for SHA-256 566301fb12ce6264…

MALICIOUS

PDF

81.2 KB Created: 2021-09-12 17:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96267e9a48f62d64b115cec1cf2474a4 SHA-1: 96be0f9bddddd820a65bf4412f6555ce732501e5 SHA-256: 566301fb12ce6264ea7a76f626a4cbf2c7d59aaa270907d1bb8264868a49196a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. The presence of a QR code lure further indicates a phishing or social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://huntic.ru/uplcv?utm_term=what+is+a+qr+code+reader+android
    • http://perevodvnegiloifond.ru/pict/file/romuwekenebef.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/mh3uuf54d6qd7mrga7gbvi5t5o/58234104605.pdf
    • http://around-sicily.net/userfiles/file/wezameb.pdf
    • http://aihyang.com/userfiles/file/12792428584.pdf
    • https://luxm.pl/userfiles/file/95166622673.pdf
    • https://aprenda-atdi.com/uploads/files/14955338800.pdf
    • http://thedreams.cz/files/47009048047.pdf
    • https://huaienclinic.com/uploadpic/files/69785960252.pdf
    • https://rugsdirect4u.com/uploadedfiles/file/waguf.pdf
    • https://annekienlen.fr/imagesfile/90138348040.pdf
    • http://liebherr-tr.com/userfiles/file/28928202593.pdf
    • https://mmoxx.mn/userfiles/files/51527747011.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f78c79584---32348584209.pdf
    • http://sunnysolutions.it/uploads/assets/file/zujubidinobulugemodekupu.pdf
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/boxunut.pdf
    • https://sunrise-photon.com/upfiles/editor/files/86961930812.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613013ee10403---44484142434.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/tabuwuwizewaruxefunirafor.pdf
    • http://hasyo.net/files/file/tudetomanu.pdf
    • https://advik.net/userfiles/file/fopajiwofosilulela.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387846f10da---12031275349.pdf
    • http://tehnicgaz.eu/files/file/62843941891.pdf
    • https://powermailer.in/userfiles/file/tuminulijiwopupibuxutatu.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_off0000d922.bin
a43cfdb8bf9b1c19f27f34e954512029970dd1ccc00f37c5a954aba4e40ae246		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 17652 bytes
font_01_sfnt_off000106fc.bin
5250314c285b98af6afca591e9cb3c37a2bfc89fe5bf37589d899c4f255838ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 10560 bytes
font_02_sfnt_off00011ee2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 16792 bytes

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