Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7547fa5712ff3b…

MALICIOUS

PDF

82.4 KB Created: 2021-09-15 11:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 070c16a62ee5205fd1aa94f8569dbc39 SHA-1: 031d3ed6a7ca7e33358fac12c68a349e06255113 SHA-256: fd7547fa5712ff3b9a9d28c0b7a1b22f494de74aae2ed766afd2283d6edac542
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://drafthe.ru/uplcv?utm_term=picshop+apk+download
    • http://boxshop.mn/userfiles/files/figewusanuduzu.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613429e1ccdea---94416487009.pdf
    • https://mimpishio1bet.com/contents/files/lusud.pdf
    • http://loveperfectionschool.com/upload/file/34904123915.pdf
    • http://abwcoliseum.com/uploads/files/tutadoni.pdf
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/873938450.pdf
    • http://hooleihomes.com/cms_images/file/lubuvovapekaritigibevipep.pdf
    • http://prabashproperties.com/ckfinder/userfiles/files/romunedediluzisarebi.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416d44125fb---ratolenejipigivuderejubum.pdf
    • http://safiorida.nl/operatori/userfiles/file/zuvalaw.pdf
    • http://jtg-antracyt.pl/files/file/23692037211.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161381e274405e---tubatexagarudomurenidi.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/57ce9a9d1809fe9c602aecafcc6b942e/jafejawowupowig.pdf
    • http://evo-models.com/uploads/userfiles/files/14495908891.pdf
    • http://burchiellati.com/file_fck/file/38122823679.pdf
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/dipafowaxep.pdf
    • http://naturpix.ch/cmsimages/file/82531503510.pdf
    • http://kryotherapie.net/neu/userfiles/file/99743329418.pdf
    • http://rootbeadmill.com/upload_fck/file/2021-9-3/20210903073431959286.pdf
    • http://studiogiamberardino.it/userfiles/files/pamovativimazofeluliruwu.pdf
    • https://karlschool.org/uploads/files/202109092138049781.pdf
    • http://lawngo.net/fckfiles/pivekilid.pdf
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/72499117553.pdf
    • http://laskod.hu/userfiles/file/fadafoxusu.pdf
    • http://cestovni-postylka.eu/userfiles/file/6041808848.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_off0000ddc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 16792 bytes
font_01_sfnt_off0000f5d8.bin
60d937ae1d99c4197782900d6b38bb12ec8f62a9542e63549f12c64b048aa46a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 10460 bytes
font_02_sfnt_off00010d88.bin
35a0902265b7f43ce8986cd2bc49061126abfc34ddce8c452642732153c66b3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D88 18044 bytes