Malicious PDF — malware analysis report

Static analysis result for SHA-256 56968995420d7e0b…

MALICIOUS

PDF

87.8 KB Created: 2021-06-29 22:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 895c8b95aa8e077987243f8108e81d2b SHA-1: f2de7ec254d3250fa04a0ebf44303f3f4c3b7010 SHA-256: 56968995420d7e0b646e5c0d5c3351a157c15c95b77edb5be2e7c9401e413e47
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malicious content or manipulate search engine results. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://queure.ru/uplcv?utm_term=city+living+boutique+hotel+bloemfontein
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b71de4694fa41ac08296431e3f6c6b67/lufesowopul.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v7mksutisiop243f6egtg4tjbo/97866003564.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2ee434b2e---18503484924.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qnl5i49b1rl0qmgkn3pkoldcfu/vaxotix.pdf
    • http://to-tuong.com/media/ckfinder/files/23743917285.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16091785ac0950---xulexupuxenisufonuxonan.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3062cdfdf---junodawimuxoporetakozid.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ffd6b012---20739888230.pdf
    • https://bomberosdenavarra.com/userfiles_nexo/files/47573094614.pdf
    • http://skupka23.ru/upload/m/lukewira.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f7c31982f---96573295955.pdf
    • http://zulaikhatextile.com/userfiles/files/98587749616.pdf
    • http://softwarefactory.nl/images/file/leruserigaluluxevid.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648d8d06bb---wetibitib.pdf
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/34707734627.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9645eda428208f5a22c9e29cc0459f8/towotepanoxuwafurafatu.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/obmepu7l6fbiqgm8p9nc3c8l3e/99765037045.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2vrjjrvf7te6lmb0dgt0en0q41/letewanatezexenanuguribox.pdf
    • http://edu-family72.ru/content/images/uploads/file/seborosepitotovafitawiniz.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bcfa46f5c---nexagupobubukil.pdf
    • http://aarogyamedico.com/userfiles/file/3149929120.pdf
    • http://dribblebar.pl/userfiles/file/88786263642.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/46054c6587e2ad7de53ca863e2096ffd/93937965976.pdf
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/libikurufonapovexikopusi.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_off0000f3ed.bin
b2e7ed25b3a3bb0a564b27bd041387be98234632ab58deb80bd5f9a53a94da04
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 17584 bytes
font_01_sfnt_off000120ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 16792 bytes
font_02_sfnt_off00013916.bin
08b00ee2eaa0e9e5c16c5bdb2c764f55fb641fd56fee1ed334d9eb669743754c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 10828 bytes