Malicious PDF — malware analysis report

Static analysis result for SHA-256 daae2f9e6701812f…

MALICIOUS

PDF

82.5 KB Created: 2021-08-13 20:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4cae162fd674e20fa2992d04962d3431 SHA-1: 2474cb91554355612fe1009978be9800bf38fa64 SHA-256: daae2f9e6701812f9f14a8f2d51fa286991e690a7688c18d7058d3e4a7134f82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=beamng+drive+apk+android+oyun+club PDF link annotation
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0bceda64c68ebc7947d5511e77feca99/35543825249.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/00b353c86d458681f3d456f706473b90/farowabutukamaxo.pdfIn PDF document text
    • http://momsystem.ru/public/file/tozewimesizafikasolag.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/40465583843.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/004588ec508ccf67a1e4c4b245e08f50/pefozisolemosutot.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/09cc027254096c3360ac4b5c23b71d47/jilasimasarebejalowamiki.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd6464c3920ce48217c9889c08bc8e7f/buleduzojumopafemotususe.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac62ec87797---nadakexewebukekil.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210731210738_3jg8th.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/lebudimomuwefala.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/23828682308.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/58eb4377f4af2e45cc05128409186f78/69774077048.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-3/20210503015635148897.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/9m8l56n1lv2jmou1fjqetodr51/dokedugavutadiguwonoxu.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210807174755.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/dutudokazisir.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a272db3b853---vewoxuxefisotamukis.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba722b6b3ab---rizofifub.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/lidotebigajejadolizatuvu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079818cea4eb---41080070070.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/69041220744.pdfIn PDF document text
    • 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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF440 18832 bytes
SHA-256: 14e62bdac3d99f5fb6600091f90f80477d27ba4baf327c2d653b96a6bbc2e923
font_02_sfnt_off00012311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12311 11156 bytes
SHA-256: 7d55c2e40cab0759a6d3ba178b98fd1db08fcae635702a62d54c7154ceb9a17d

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