Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d514c0c792d0d4…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 08:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cb91e126b0cd02023f78050c7988b148 SHA-1: de8d4db2b106c1088e8f583e70e696a6c92fcd9d SHA-256: 14d514c0c792d0d4ea0e4ad01c19d57eaee8af50129a7b9d018a6daf356793a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as 'medvor.ru' and 'consoles-a-gagner.com'. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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=fifty+shades+of+grey+hollywood+movie+download PDF link annotation
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/buvawuba.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/27314910022.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/65719646496.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/vadenosetepemunavas.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/48544926371.pdfIn PDF document text
    • https://dptech.vn/uploads/files/84144679131.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/98940722248.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/51491108259.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/66204987549.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/jegilajimekavabonunoda.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/90995343f1b60db63f79469a3fd1f699/29643298319.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/dolomunuladaxolidabumona.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/buzotuzafojosadovi.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/55204154967.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/risobajamamipizebolefe.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090610142949.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/51440444778.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/tomebiwul.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/fiwebozek.pdfIn PDF document text
    • http://www.heksan.com.pl/file/zidufiwexisonerivokuwej.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/welelevusatomafozamosilit.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/35841566659.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161477e62364bc---66177099628.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d271160119---82392801871.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/phi37u2tfigckafqk174c0t9ua/4499729831.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/30625068104.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_off0000b2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 15364 bytes
SHA-256: ba03ec27064bceecec9bb0ba240c4e1febcaaa4daf2f6303ebfb6c87d209e5df
font_02_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 11044 bytes
SHA-256: 95993fa1682c8ceb45c455ffe2edf11599a38b041504fb5cdbb08125b4922517

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