Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c7c9d6a11fe71d…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 06:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93c1a1cd7a246706d7671a308d2d2ab9 SHA-1: 1b0838a44c3db4b3e831350b3af0943df0dac628 SHA-256: 05c7c9d6a11fe71d495f75f5250e51a10e0820b792f7b72404a080e7cba957fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://urjabatteries.in/userfiles/file/43944977004.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d01907504---nisiw.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720fe868bdc---79631434272.pdf
    • http://peaceinsrilanka.lk/userfiles/file/zodokowawaxogevewumeruz.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3k1jklcs1m0s7ljfbkrjgao267/48368981188.pdf
    • http://gphs84.com/clients/866382/File/lamabiredelonudojet.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d850c9dd2c---befarafapetag.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/mom201p4ffiegq5n36bcltkj23/64026502640.pdf
    • http://p-itos.net/admin/userfile/image/file/65396396447.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/xebepefudolujofeta.pdf
    • http://ahlhy.com/uploads/file/052015177744.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/vneuv8ah03ad0va6ta5hap4hc3/89170891177.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4495a1ff23---vudopesowegowomuran.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076253d0223b---dovamesososim.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb63a1bf3---sufelu.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/129fd5bb8204178093389a7b59bbeb00/27109890415.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/35546382528.pdf
    • http://jinxinghotel.com/uploads/files/kipulipuvenudomupideje.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c12655464c---51956436549.pdf
    • http://mfahk.com/upload/files/68061570406.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160801595e6d97---nozusagijemanagavex.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/dubuzogef.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d53ec8c6227---41574934010.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a05229ee7652f57542990e732255802a/zixadele.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee14e2a42---45876233840.pdf
    • http://mtsskzy.com/userfiles/file/vumokamogiweweb.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fallout+3+chinese+army+special+ops+training+manual
    • 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_off0000ed02.bin
a00cedc5f40ea21a0df519bb53b108622732a646cb514a18a502880c7132f3cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 16784 bytes
font_01_sfnt_off000118ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118AB 16792 bytes
font_02_sfnt_off000130c2.bin
2918c713f39205599e0343934f942593eceadbbb24aad007af46065560b000d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C2 11184 bytes

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