Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da76ad3594112c1…

MALICIOUS

PDF

84.2 KB Created: 2021-09-20 03:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d4c876d3aed1ecf2a9cc032e2a22240a SHA-1: 5a73c1d61fa3b6b5e9380e68ec6e98700fec6064 SHA-256: 3da76ad3594112c17830ff7afc1d92e19a3249c00e4d880e2653fb7680291103
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9981

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://huntic.ru/uplcv?utm_term=best+vpn+apk PDF link annotation
    • http://rovitek.com/userfiles/file/nixetabuzepilewo.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/lagugagebezokasaforupewa.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/xefirakigobolekisolet.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/54957006237.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/vexosuda.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/11770699883.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16142647cce31d---nofonurap.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/vubawumitoresufuf.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/78930427688.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/88507922358.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/gafonaxij.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/nilapefofuxirozutas.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/gisujulitiwisoj.pdfIn PDF document text
    • https://webmenuplus.com/images/file/dajaninekomo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613120865c1a8---damin.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/35411677241.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/55375118220.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/mosaxekuvewerimixejumerem.pdfIn PDF document text
    • https://red-adlay.com/upload/files/28921235048.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/22886824256.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/18538771598.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109011502406591.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_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10096 bytes
SHA-256: e8fbe1f2b440b81bc395150f2f52de54c2dce6f10f186ee8b5579ca9afc77d3f
font_02_sfnt_off00010fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA6 19740 bytes
SHA-256: 73a76a5ddddbf22e037046e0ddf9a07f7ed50aee6db16de41c45ae5709c1ec59

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