Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9133316bfd8abb…

MALICIOUS

PDF

78.3 KB Created: 2021-09-09 03:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e549fe8ac2a81b5c6cf1f3c31be5d4d3 SHA-1: 82f3dcd264c62d594860cf2b6861434c428593c7 SHA-256: eb9133316bfd8abb4a797bcee7c9ba1aceb20cf1384fe58ed723faf942ca3711
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings point to the PDF acting as a link farm, directing users to numerous external URLs, one of which is associated with 'call of duty ww2 cheats', suggesting a lure for potentially malicious content. No scripts were extracted, but the PDF structure itself is designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=call+of+duty+ww2+cheats PDF link annotation
    • http://aviatechinform.ru/sadm_files/duzewovogomivevu.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/66500941293.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/2521068328.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/zogesesoxexepe.pdfIn PDF document text
    • http://artio.pl/files/files/xobibifomipanore.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137307312045---demadim.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-2/20210902231712581442.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137eeed74cde---peroxuritabosatum.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/68006795406.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/82804772629.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/67031386707.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/71086166880.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/nipenivejusa.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/nulewojotoxakuzuwojeb.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/wepekesoxuziz.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59849356877.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/4922444689.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/67686149883.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/vulanerelewavazugiwevowi.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109080112586231.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_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 10728 bytes
SHA-256: 9507d567cebb6d76b136bd150ae5cd4e0b28f5ebe162c26ff8e53de15a3a34b6
font_02_sfnt_off0000fec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 17812 bytes
SHA-256: 7fcc7989c554bbb1989779894d1c442f09a82e491208385ea15a95691369d70e

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