Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa349f481878a967…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 11:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 432baf7d194949d3f56a1f437469d484 SHA-1: 27ccada5da4301385d429553a4754340471f1868 SHA-256: aa349f481878a967f6e4b51f93719bfb3924efd1099b29619642e94c66f30068
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 0.9960

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 http://seychelles-resort.com/images/blog/file/riratibifel.pdf In PDF document text
    • http://voszveszprem.hu/_user/file/72114376909.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210905_2E69839D09A61598.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/40628594845.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/wupetom.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/mimijiwelinajuwogu.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/rakukajosem.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/03/32028184600.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/51309772117.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/77730118439.pdfIn PDF document text
    • https://duvanco.be/docs/files/nojesugoberal.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/3261871448.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/rutigesomisaxatafogejel.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/fepatawalo.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/xezadumomexatalujaf.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/80806032938.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/21069081719.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/wusixulunatub.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/24813096735.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/65136676798.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/navebelidijujaravobodutu.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/fabavofum.pdfIn PDF document text
    • https://virker-ikke.dk/files/zirezasugenag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=tap+tap+app+for+pubg+downloadPDF link annotation
    • 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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 10572 bytes
SHA-256: b9c02c910eaf7fa7d3b8fac9519aabf24ee51811644a40001dd1a98e08624a57
font_02_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 19808 bytes
SHA-256: 66529d82e344117779cc45ed2243f5a6aac28a7b9e76940c61112a0de0891b4f

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