Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd2ec897add921d…

MALICIOUS

PDF

86.2 KB Created: 2021-09-23 02:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 503a11049fc1d37db519e6c5a54db9dd SHA-1: 5fd5c419d0a5c8d77a2f56713b896bf418c1c6c9 SHA-256: 8cd2ec897add921d5e2f75c9064f148a73b2d8e42255bb50d9b844a089a91030
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading a secondary payload via the provided links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=gta+san+andreas+download+mobile PDF link annotation
    • http://tuzy.pl/Upload/file/85899391765.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/fipeloranajofoxaxodagumuz.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/darewumipubetuzofat.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/17427091352.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/93515624736.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/63792323006.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/17335969299.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/6024868312.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/43811064013.pdfIn PDF document text
    • https://xenonsvjetla.com/files/rovasukoj.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/608959924.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/20376673876.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/88894127213.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49788492101.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/53728435532.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/16064578667.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/29838049420.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/wubuzowewiridirolugus.pdfIn PDF document text
    • http://rhondachem.com/d/files/24868707801.pdfIn PDF document text
    • http://4darchitecture.org/img/all/budusovijopivibikinu.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/99467339847.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/28985332937.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/13180661607.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/lcp5aqk3jo1chrdj04pa1nkjd4/sirekubenir.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_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 17332 bytes
SHA-256: cecba7604a7c9f43b07568b5430232647b8cac6835f884a8ced88af0b4967e62
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13287 10676 bytes
SHA-256: d6576d0ff2ad6996fe518d106ce9b89956793a28fa47a07527f3e688e8c5ace4

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