Malicious PDF — malware analysis report

Static analysis result for SHA-256 360810b7fec76b10…

MALICIOUS

PDF

95.0 KB Created: 2021-06-28 04:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 176315ade949517c68a357344316c2f2 SHA-1: ba81ad279b73dd37ea8614152fe714fb770d3db1 SHA-256: 360810b7fec76b102c486e2f22c1de47269820b9ff82b81835d9e8b3028a1add
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure suggests it's intended to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be05b29f51---pefoxavonelonojij.pdf
    • http://klefmarken.se/upload/file/wosofebuzuguwin.pdf
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/d61f49702f4549480b15bc63c35f4e0a/89398993065.pdf
    • http://ks4073.com/file_media/file_image/file/povum.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad8d28e3a---xikuv.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/a2d2090f7e47cba8c9ffae4f467826e7/13414553666.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0l72qqjs7j77c2j6qqaevpbh8q/82608834233.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fb917920---kuvetiwijigo.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16087974c8da52---sumedubatajas.pdf
    • http://acecaalcoy.com/userfiles/file/15263008644.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/51632947629.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/khqnhftb78suuifmrel9kv2rj7/kefidalaz.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf5f52cc9e---75364354448.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a465cf88---losubamejosoti.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/e507aa06523e9eb0811bda4249b1a89f/somumij.pdf
    • http://noithatnhapkhaugiasi.com/luutru/files/97666258123.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/e89bbedb011b6ced8ae31a56cf3731de/dibamamewobovekorunapa.pdf
    • http://cuuhoatudong.com/upload/files/21426660905.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3cd42752---garepofifetinipipole.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/a3enitpt13klonfk1esb9ngb33/nizadusularuwi.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8e3f8ca9f951fb85af146b721f924f7f/36584354680.pdf
    • http://poorclarescork.ie/images/sisokujopurefo.pdf
    • http://dancephoto.ru/userfiles/files/xawosogojusederazapof.pdf
    • https://nestaerospace.com/uploads/file/wepadefixoparifelupe.pdf
    • http://rc-modeller.se/images/file///88075198884.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7buao0l73gk43ugsp05591gn2i/pikuduwijagavedonelufe.pdf
    • http://jrmhandling.nl/upload/file/mazotowivuxakase.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=notes+on+cinematography+bresson+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_off00010e12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E12 16792 bytes
font_01_sfnt_off00012629.bin
61f840bbf4ac85fdcf7e7a6b7762af1633b87895c5fe02d13e5f1df3103cea33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 11252 bytes
font_02_sfnt_off00013ff6.bin
cefad5b5625ca32da48186bce570e3795d2d1312dc1f45b0006eb86af7fc8917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF6 17888 bytes

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