Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d32e451910965d…

MALICIOUS

PDF

89.7 KB Created: 2021-07-08 10:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1afbccd994de7f6c9e76f59a3c8670ae SHA-1: 7146c948df18ac864a626611420f33ec83d45b95 SHA-256: d8d32e451910965d7fb482cfabae80b138bd94827dee7baacf4cedc0de50028b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to host malicious content or phishing pages. The presence of multiple links on disposable hosting and the use of 'utm_term' redirectors suggest a coordinated effort to distribute malware or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1c6a14a36---96399205665.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ae12b756963a054222728baab6683513/29179484642.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e593222eac---fofotuneveto.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4196d06d32---xilidobuzenaxew.pdf
    • https://lavaecucebrescia.it/file/rurikolopiwixejufefod.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c722d80b---53143331426.pdf
    • http://cablexconsulting.com/Upload/file/61345016646.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609653b6c4a02---66065701790.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160845b1c06491---razazazi.pdf
    • http://seoulsquare.com/userfiles/file/12180123239.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a3ef5374b5e0fd2d9cf842f903260328/58357711970.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a02976f6---vetavowibaje.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1eb052cf0---45884696350.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b331182680c---9124082827.pdf
    • https://vvpta-irvine.org/userfiles/file/27270048949.pdf
    • http://msslink.ru/userfiles/files/bevodevisupegifalalab.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/0650797d81fbcf61d752ea9211dd7f07/71049472464.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1a8e329a---50932780098.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bf9ef2c31---ziwafosemunojidaman.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160da0b8b7a1bd---nesuzojujaxagopexan.pdf
    • http://namjapizza.com/app/webroot/files/tojegarubetegidud.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/dcd1271703e191562e6518b4fa88c9dc/55835577768.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ad6008e1---3914849450.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=chicken+and+rice+casserole+with+cream+of+chicken+soup
    • 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_off0000f78f.bin
0bee610da91e3b8d84dc06d1ca1ab5b0135b4e3ff83a1ae2e7eb940d771c907b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 11192 bytes
font_01_sfnt_off000111ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111AB 16792 bytes
font_02_sfnt_off000129bd.bin
8f93564175cb23fa40b5af556a42c5e0f61699249671c512c4d9872dc1bdbc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129BD 17916 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.