Malicious PDF — malware analysis report

Static analysis result for SHA-256 414c19343a997579…

MALICIOUS

PDF

89.3 KB Created: 2021-07-16 22:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dcb218af9197d3103043120b93b7ccb SHA-1: ef8753cd2318f168edf08d945c90e6bf89ccdc0d SHA-256: 414c19343a997579c12b742f461c475ba5de325639de87d9369996bf8a952b33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 used for malicious redirection or phishing. While no scripts were explicitly extracted, the PDF structure and link farm characteristics indicate an attempt to direct users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b225d561fd5---10793284681.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/08056d04172d5bcd05f358b1d1460a7c/91521518251.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085275d05c67---gepovavasoro.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnvh5ki1miuav9kct473mr0951/56466422755.pdf
    • http://reutlinger.pl/userfiles/file/22764926597.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/m37tnr30l4oqleksiosmkhud92/vubesitexujezutidugalumis.pdf
    • http://aroma-es.site/yamituki-n/uploads/files/69489889184.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/fa63fad92fbbf068ce06cde450dfc997/4679560960.pdf
    • https://recapress.com/ckfinder/userfiles/files/28106715789.pdf
    • http://kryotherapie.net/neu/userfiles/file/xamafisosa.pdf
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/33776290646.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/d7f86fd6757ff6e0d2437036b3a9ba7f/87013644004.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cbb718a6caa7b3ac3cce74a550d348f7/kuvepepojakarijijamebim.pdf
    • http://rzn-house.ru/upload/file/99633305418.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/pcreedudb1l3ibdc6smot14u7c/43879743686.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903eaf0b5b0---92176780636.pdf
    • https://isosklo.cz./uploads/93704744356.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/92933219710.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c770de9ee---wajagobadokakawiv.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac1b983905---komilugelorovenixuwax.pdf
    • http://daeryuhealthcare.com/ckupload/files/xejeve.pdf
    • https://hostessima.pl/userfiles/file/jibazilobelopibevafi.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcb30f919---24221170246.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8a5960d46---zemexududupufitafezuror.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+draw+dragon+ball+super+characters
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae7.bin
85374e22850fca41d12791e6e1fec60525102751b7ee5a57c8ee92e63806fd2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 2960 bytes
font_01_sfnt_off0000f758.bin
8cfacc5629588970f4259a679e84574760f3b2ff578015f06b42a2c6ea43af80
pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 11016 bytes
font_02_sfnt_off00011086.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 16792 bytes
font_03_sfnt_off00012898.bin
ca2c6d0ad444490ccdc002e418c1986ec6a6be3e2c70a98a1c958ed5a1d3562e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12898 17748 bytes