Malicious PDF — malware analysis report

Static analysis result for SHA-256 5045047a165061d4…

MALICIOUS

PDF

91.8 KB Created: 2021-07-16 00:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ee7574452a2ca482db4c68409fe393b SHA-1: 4a4fdda829243f65b541ce53a00dc0313e001d51 SHA-256: 5045047a165061d4a8d8e3eaac7c2a83740473902ffbc8aee8dff1f61eca27fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection indicate a likely attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/0e120b3e63b9a495dd5150243f44ee18/zilamuwaxunopizopeba.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc3ef9c4f6---76581749887.pdf
    • http://asustainable.com/global/file/lezini.pdf
    • https://twr1115.net/files/fckeditor/file/tefozodoxegidujeto.pdf
    • http://adamlegal.com/userfiles/file/86290857169.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/81de9b54e6e9a45008d7e07df5f5b87f/ronoxado.pdf
    • http://bhhangkhong.com/upload/images/files/10623323715.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160786653cf9c0---kumubediluvowa.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813aa1a87f9---sotafurawijonifekaju.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/tujimararuralulibe.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074639f744bb---dowunulawevuxev.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/803a6d879404662fbebbce4d259ef3a1/75578631727.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609067cd8e5c4---32328938324.pdf
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797b7989957---xaronajozedud.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160989f3950ce9---49479202223.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b851e2b2017---76423914955.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lan7lrrjbhd10nlolmbha97800/70076461703.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/41255600461.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea6543b93---27245132014.pdf
    • https://kheops-so.fr/ckfinder/userfiles/files/sazakodawifugulefebep.pdf
    • http://adria-ex.com/images/blog//file/lobizononilonozekajuvet.pdf
    • http://polletnv.be/uploads/files/zevukape.pdf
    • http://boisehighclassof1965.com/clients/879780/File/47018340641.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=empires+and+puzzles+training+camp+levels
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/446afc10c2100bfdcee221abab1303b9/pupunilamuvovuzigiguweb.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_off0000ffc2.bin
b091f90d9f9082e1204082afbb104ec220c3b6afa5c1fd8f56451bb9fd6c44da
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10944 bytes
font_01_sfnt_off000118f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 16792 bytes
font_02_sfnt_off00013103.bin
e9c74d6141fbcd152bb930552843e3103ae865b23865fb50f539462af3218626
pdf-font-stream PDF embedded font (sfnt) at offset 0x13103 17788 bytes