Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c9220ecba950ce…

MALICIOUS

PDF

93.7 KB Created: 2021-09-18 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c27ba39fe98028330e74e8e721d9bb03 SHA-1: 731ef65fee982af3741e3bdbde6c704a8d4de9cb SHA-256: 58c9220ecba950ce6cbd74c80016744a683d8ad0e3d251195b3c9629af9e0202
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=the+good+wife+streaming+season+6 PDF link annotation
    • https://igk-lilienthal.de/downloads/67199256801.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/vimomaxuxapired.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/donunimegikavevuzi.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/65151911006.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/41650595949.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/82220445033.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/geledox.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/xodureto.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/fujazavifunojezap.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/rozubuzububebinidupoma.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/posisen.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/8612827154.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/pelolup.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/togigig.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/86575699670.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f51b7900e7---86852641430.pdfIn PDF document text
    • https://aksusu.com/upload/files/51022084883.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/27363971871.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/21925120902.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210908182908.pdfIn PDF document text
    • http://apismorava.eu/docs/52442838985.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A4 10972 bytes
SHA-256: ecfcca9820c708eb89ff329f3a065c06f1eadd6ebf45fb10f7ae4f4c78090005
font_01_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 18232 bytes
SHA-256: bc8f1313beb7d828d61408a23900856f0cb5f263f81630de6e0b4fcd8be1c579
font_02_sfnt_off00015117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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