Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47953d5c2940f7d…

MALICIOUS

PDF

90.6 KB Created: 2021-07-29 17:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de5a1704a14085a13c9fc65150804143 SHA-1: fd2b6b38903cebead714fcf7667a5e322c7b59d1 SHA-256: a47953d5c2940f7d75e986535d5f0ff72802b31982609a6500a13a7f74f2aa69
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and remote support tool lure. The document contains numerous links to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious payloads or redirect users to phishing sites. The presence of embedded URLs and the 'Remote-support tool lure' heuristic indicate the document's intent is to trick the user into installing or connecting with a remote support tool, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://timebank.ru/sites/default/files/photos/pagefile/tunogekitolorezowixexika.pdf In PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/7hq4kggt7eanhhbrq2o2tie8jt/76154115497.pdfIn PDF document text
    • https://artbynela.com/uploads/file/50077095040.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/xamawojuzizozusupibadet.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/90253353184.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/34402816611.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/zupewa.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/54775580632.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d34e02cee---dibata.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89fafd60bf---mumidawuguzuxugilowozam.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/44628130481.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a10a6231121---56782581155.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb3c0434d---68974053521.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/23031641812.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/xajuparefaviwetukunefibux.pdfIn PDF document text
    • http://ubest.ru/images/file/befupejo.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2834c0bd8---netisaxewafo.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/78117490468.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0qt22iol8linjf7lrdim6o0fb0/jesonuvixaganibaxelunofur.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/wujepawedebadodaw.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/13846662160.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd412562fa2---74989237803.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/44688148615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=2002+toyota+corolla+workshop+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 16668 bytes
SHA-256: 2836c8405ce2f7c0dd044542ff5fadad232f1279792fe34e9cef89773703017b
font_01_sfnt_off00012b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001431d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431D 10952 bytes
SHA-256: cffb40e614058e679b42841d0f31ae2958f77ab43cf24aee18eee843c315bbca

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