Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c3c85001f55f01…

MALICIOUS

PDF

82.4 KB Created: 2021-09-09 13:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 95b17e39cbfd96abde7c37362c6c14da SHA-1: f1c7dc6dc80344a12a641302771ec859862d4e32 SHA-256: 98c3c85001f55f01dfdaa4ee5913d6323405f33727e05b92216f8520ed3c487e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=pirate+kings+cheats PDF link annotation
    • http://konsultacjenaukowe.eu/Upload/file/kigupefew.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/2349846136.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8776af585d463c9c2f684f9e0076ba12/zorabeziwokedaxeve.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/sutonovegade.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/gudoxepabixa.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/10167485883.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/pawoti.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/95599032822.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/78390218845.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/laliwologajefekajis.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/dikodanufagotaxonap.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/fesewaleki.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/36144955582.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/8794988287.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/47849803524.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/levufodaxisa.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/19311057890.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/44903376009.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210906211639.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/jepinate.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16134bdceb587b---74994966037.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/24686323441.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/vesuziwa.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210903_095040.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/78159919271.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_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 10436 bytes
SHA-256: d6f4a879ce74a7d4b2710f13e0aac2f1c540deee7827108f8f3bebf10c2d8bda
font_02_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 17740 bytes
SHA-256: 77984e371a5376f6207f6c7220ffd15cb84d8fedd84a23a39069700e229ea4a8

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