Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6efe31393467fe…

MALICIOUS

PDF

83.8 KB Created: 2021-08-24 07:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9ab977919f7810a43fa77f39393c11da SHA-1: 0a18506a7a782a89af66dae81f7e7ef961f8deb2 SHA-256: 0e6efe31393467fe1bc61a74202ecae6576bd65f857d266e2bd43856a3145764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a phishing or malware distribution attempt. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern. No scripts were extracted from this sample, but the overall structure points to a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://medvor.ru/uplcv?utm_term=james+bond+007+tamil+dubbed+movie+download PDF link annotation
    • http://ourpreferred.com/userfiles/files/zuragetejabamuratodut.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/cf8234d64cb9b0bf92cec5769cf4fce8/pogizid.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609822e551784---73281107909.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/15454438932.pdfIn PDF document text
    • http://sy-smile.com/upload/files/63673438139.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/nesudanejamivomijafuwutok.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/ritujatimeferonozev.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a9b04e72---80255361839.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/nipjsfbh951qvfiv7a08n9und6/28525466019.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d913d2d3d---feberatiwulipuf.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0ccfd1b10719f97be804949f0d500a2d/kozamuzo.pdfIn PDF document text
    • http://merwepizza.com/upload/file/81732230921.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/vemidisekixexiweboneno.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/zubodogamafezudunajo.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/zavopamisuretuxofazalezi.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5tifkuh5cthbpkabqrqfsgis97/67248949666.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/bibebemob.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/nuteviw.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e160f7d03db---movirisesinevitat.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/zupatajovenejofojebajilit.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/31809050220.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/60749974348.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/loromimozagawu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2226e51f---50215029531.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_off0000e3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A9 16652 bytes
SHA-256: 9500bbd02a059945347a28dc0c374a2d69df90a925ee886182ab65c34ce4ecbd
font_01_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 10864 bytes
SHA-256: 8fcc426fdfdcf134b66e1489b3b36caf2a473c2c456588aabbc6d8bb6ea2b379
font_02_sfnt_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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