Malicious PDF — malware analysis report

Static analysis result for SHA-256 02404048b6a0ce30…

MALICIOUS

PDF

91.6 KB Created: 2021-08-09 03:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3107312505cc4ede41540fca136ab11b SHA-1: 7f7055b2c578382da4a7903370aa648b58922340 SHA-256: 02404048b6a0ce302c5b02cd08f918a7da6fb677463bcccb862a5df8df27dd54
156 Risk Score

Malware Insights

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

The PDF document contains a link farm, directing users to multiple external websites. Several of these URLs point to compromised WordPress installations, suggesting an attempt to leverage these sites for malicious redirection or hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://oniceh.ru/uplcv?utm_term=lecciones+para+adolescentes+cristianos+evangelicos PDF link annotation
    • https://atiksigorta.com/files/93609045194.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798660b048a---88156963917.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/06e4bec90c3cb88a4706b2d5607f6353/12027951774.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16079c59137a57---bumuzulegupe.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879debbbbe7---73562253276.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/sigofijekife.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/gaxet.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/tipupilegokoxe.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/42949798305.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d0057acb30bcbdf64cfd520d031646bd/35455331648.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o2brd7qiiukco7hog90c72lghm/wisukifabazo.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/zewotokefimene.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/80430632232.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/73352743425.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/77215362614.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/vibowesalaroroba.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/fafexegodofi.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/81259814001.pdfIn PDF document text
    • http://hnspkjx.com/d/files/78286851189.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/firobe.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b1debba8d---pogunovifafuriwulate.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/tabunoxunez.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_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 10712 bytes
SHA-256: 3711d40c496d8e03adf71368c54f0c05b5eaccb7588c9040b733ab3fa4052f4a
font_02_sfnt_off00012fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBF 17980 bytes
SHA-256: a0d55bdab3d1cf4e161cb85c9bc2d85bec52e9c1a8e793bfc38e627ac47bae85

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