Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2932dceac1b764…

MALICIOUS

PDF

76.7 KB Created: 2021-09-07 01:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53f43aaf6cb5bd74f4cc6061d12b2a6f SHA-1: a640aa695c599dcbf26e5d196f22c6b2ccb4e69d SHA-256: 8e2932dceac1b764db5c37ab2d3350f95bc384dd754b9746a5dfb765f856f851
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://isemya.by/modules/ariol/static/ariol/ckfinder/files/pepumixisuxezavis.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1460f4a719---8581170320.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1cf821050---xeparajilejivu.pdf
    • http://riversedgefm.com/files/file/sivofulobamokezu.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/25058109459.pdf
    • https://altbuket.ru/files/soxexapibidewa.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/2667f002ee4487b487446a8986b49302/8574320136.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609879501c231---pulabawimekomixazabe.pdf
    • http://whatcanidoforyou.eu/publish/file/26994135512.pdf
    • https://soccerauquebec.com/userfiles/file/48815654755.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/82770373fbb0f6ebb2ffa6262688bf28/wijukizud.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b978f906e54---pugike.pdf
    • http://xedaptap.net/userfiles/file/10204089944.pdf
    • http://agendaalzheimer.org/files/galeria/files/wulusiv.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75fa33680f---kewutanirufazin.pdf
    • http://tgtech-auto.com/userfiles/file/kanoxulufewedefavasi.pdf
    • http://agriturismoilnoceto.com/userfiles/files/83170813563.pdf
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/xuduganulalolujala.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0229ca262598e1b44e8ab4800d6e7b43/luwogazatuvu.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/09c34df65218da1689ac3d94618bbd6f/54010698105.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/22501265659.pdf
    • https://salvatoredivilio.it/userfiles/file/53061253846.pdf
    • http://thebankcardservices.com/uploads/files/gadekimidagexel.pdf
    • http://novosib-sport.ru/ckfinder/userfiles/files/zuziv.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c58d2e9f5c6---22666379098.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=faithful+to+the+end+bethel+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_off0000c7fc.bin
13254f7979d39b5d4e6e04e081e666bb3130df12034195651e3f64dff37f19ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 17528 bytes
font_01_sfnt_off0000f556.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 16792 bytes
font_02_sfnt_off00010d6d.bin
949b34997411d398b7a30725fe98c666f8f801f70fa9a2c7696da7e8a92d5b48
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6D 10544 bytes