Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfefa60d9cacf894…

MALICIOUS

PDF

80.5 KB Created: 2021-09-22 21:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c58d57130dba199b31de179ce47e0106 SHA-1: 3f859547d8dca373e49428831801747820877b4c SHA-256: cfefa60d9cacf894be75b88814dc875e13f22ddc60ab5c0fc5968ae71da2a07f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous external URIs, suggesting it functions as a link farm or a redirector to malicious sites. The presence of urgency language further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=grindr+xtra+android+apk PDF link annotation
    • https://edouardweil.com/userfiles/file/giledabigifasijoz.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161330f244903a---kukejixitavadunegi.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/nogog.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/vopudu.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/59883341382.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/5k5s1ak66midr642rp68vcoqqn/5283247533.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/juviwososinemowe.pdfIn PDF document text
    • http://safetruck.gr/images/file/48280567178.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/xuwazaponaredoxade.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/gidapeduxixofu.pdfIn PDF document text
    • http://maihome.hu/admin1/file/vezediwowituwokesosatepan.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/31046588300.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/jevupafuwo.pdfIn PDF document text
    • https://hiroyoung.com/data/files/88180342714.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/vavedidegunalupiduwiv.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/fixubezumujof.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/54723114391.pdfIn PDF document text
    • http://kccmaul.com/files/files/pimij.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/gasip.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/46544783793.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/62147583820.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/vowedewenasobarawilog.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/92269168964.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/gixodudokudigazuf.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/12651387762.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/57718086867.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_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10272 bytes
SHA-256: 0c54e2c080ac0da259077db6086ad9283b2dc92aed150d54075a18b3463c55fc
font_01_sfnt_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 19008 bytes
SHA-256: 8d06ca9b6c3855b5b107552d6b997767136da5750b8df5c5e4d8ce6f5a50a446