Malicious PDF — malware analysis report

Static analysis result for SHA-256 47da10a9ab10a707…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 22:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a68e7a52996b2230de40852b297fd0b SHA-1: 3933105dc54179b2aebad2bd882e6cf6ccd81104 SHA-256: 47da10a9ab10a707854d2a1b649c8acf59474a3b913381bbb6bc2f470d323907
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to potentially compromised WordPress upload directories or disposable hosting. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://aplus.to/userfiles/file/91837852322.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa11088f3c---19587325953.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6980ef4385eb45ea286502eb93f3b9d3/nupulobitexinebetoxoriwu.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/786f17ba9e799d0423f4ee3a7d871803/wukakebukilumi.pdf
    • https://bisnismedsos.com/userfiles/file/72403216458.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e35409c0---17911735064.pdf
    • http://rymwid-training.com/userfiles/file/45611551484.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b8ebcc9c3---bojebixufomefulesi.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f040b7c3535fdffe7a50fdc95e362097/rifuxipusogo.pdf
    • http://www.heksan.com.pl/file/wanufuxaw.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2912m04ep6i2mupatsjdij83j7/rubabasudo.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a1d31038---91733840885.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16092fbbc7f409---24485015750.pdf
    • http://samrayburnclassof1980reunion.com/clients/873185/File/wakuvakifuxuvu.pdf
    • http://soft-pro.hr/upload/datoteke/83591828323.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c1a2e0d9f---19205746274.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a79e3740101---81004785342.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072e4545fc45---37754003089.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/472903fd7d50929f07a25397b8ce11c2/44937549640.pdf
    • https://an-professional.ru/img/files/file/zosefujazewaverifabelavu.pdf
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/wuzomikomifepipasa.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c2301e9a6---1699165585.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b3535bfca---vabifes.pdf
    • https://vandolderskb.com/images/usr/boveweseb.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+complete+guide+to+ecgs+5th+edition+pdf+free+download
    • 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_off0000ee2a.bin
c7b10d6fb29ceedfb95862d65fc495aec4cdbfaaf01cb4a8298fb6416c9f341f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 18272 bytes
font_01_sfnt_off00011df0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF0 16792 bytes
font_02_sfnt_off00013607.bin
b8fb0d9afb86cc101f88d7587ba2e89147dba7c3540252feb6f3cdd4e15525cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13607 11352 bytes

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