Malicious PDF — malware analysis report

Static analysis result for SHA-256 6214f9c7bbcc5e29…

MALICIOUS

PDF

81.0 KB Created: 2021-09-03 13:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16181d9afa578aa3d7b18968a1c977d8 SHA-1: f2d237d3bdcb438c90be5ecd6c2667ad3a1d883e SHA-256: 6214f9c7bbcc5e2976867892e0d2ea51be9f52aebaf18bc74ac69735af4414fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://podiummoda.ru/userfiles/file/64275657751.pdf In PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/zosotej.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/04c239417b970a7aca783be4129b25dd/witisefajex.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210826104818.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/xasagutejulipimupur.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add4301315a---jisesawagidoguzosop.pdfIn PDF document text
    • https://onlinendttraining.com/files/sawofajoxefabuwufof.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff680bd517---muzijadadule.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16117c94531052---73365767383.pdfIn PDF document text
    • http://regcureguide.com/files/files/guzovimupetivoguzekawoxu.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/7454496736.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d3d5d02da---nelakipulax.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/nuxujuvojan.pdfIn PDF document text
    • http://atrsara.ir/resource/files/fulezexilemarorubamika.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106182154.pdfIn PDF document text
    • https://rotherelectric.com/files/japeraxaxiwaziwiz.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/42464922295.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210825015145.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/33526992792.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/95359714769.pdfIn PDF document text
    • http://vhshf.de/File/zosupegigun.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/tuxomitulubuwofud.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/34c863b1f7699cdad32f07bc954f49fa/zeguxuwazux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mild+hybrid+vehicles+pdfPDF 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_off0000d805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD805 10548 bytes
SHA-256: dd6b2232d7fd605d19e3f505afa119e21c230989a7e5c98e56896d8500b38076
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 18312 bytes
SHA-256: 005493af0230509bb7cf210381d728e6036eb94e176cc21f206352771c012c5f

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