Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda2cc35fba166a2…

MALICIOUS

PDF

68.8 KB Created: 2021-10-03 00:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cadf21144a3ea81c35cd81e403696aa2 SHA-1: f3e13cb97dd72d53af5676eaae6647956d62b8e2 SHA-256: cda2cc35fba166a243ac9a44ca63eb439842291ebbe89e9f8efe0676fd84e761
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially harmful websites. Although no scripts were explicitly extracted, the nature of the PDF and the detected heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://ijaetis.org/ckfinder/userfiles/files/15386321219.pdf In PDF document text
    • http://centrlita.ru/archive/image/file/87698480612.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/69056127989.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/46515261501.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/nuvemevazumigamitazu.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/pefujekeviwutenobujizufi.pdfIn PDF document text
    • https://ccskin.com/geektic/files/muxiluzu.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/biseletebugotinaxosope.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/fararobopetakibigelariso.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322a08c5133---10912133203.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/nikofifatulod.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/23820240561.pdfIn PDF document text
    • https://sk-elektron.ru/ckfinder/userfiles/files/42662194529.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136162dbfa61---tolege.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/52260586961.pdfIn PDF document text
    • http://micruts.org/userfiles/file/1350399522.pdfIn PDF document text
    • http://robedecreateur.com/img/files/zelelo.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/zajofexisawejibob.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/wemaritadikubeluvo.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/jatemavutuvesosumaxan.pdfIn PDF document text
    • https://cope.lk/assets/media/file/39152550403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=baked+cod+from+frozenPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F5 10440 bytes
SHA-256: 8189d46e14d166458199400a63b2094e3c64c8254995e31eb2fd8505929ffea4
font_02_sfnt_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 16568 bytes
SHA-256: c2c259834664b3544e5a334ae8002a759e294e3487e4c94db7dab5b1b4203482

Open this report in the interactive analyzer, or submit your own file for analysis.