Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08eed2a509c3ebb…

MALICIOUS

PDF

74.9 KB Created: 2021-09-12 20:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c7155025b4f1fdbf15ac2fcefc0b2460 SHA-1: 517e1a9afbc0cc79a33951318582ac2402dfe472 SHA-256: c08eed2a509c3ebb59140fd6a7410e6e6315ec003b5cf3c572a81f9615834103
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving redirection to potentially harmful websites.

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://cructi.ru/uplcv?utm_term=wake+up+and+live+pdf+free+download PDF link annotation
    • http://nextlab-semi.com/files/fckeditor/file/97688994910.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/redixirupaxi.pdfIn PDF document text
    • http://kcpsystem.com/userData/board/file/42992146521.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/zegoriredarot.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/logomeg.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/65675006930.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/gigadatavawitojoko.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/22609916971.pdfIn PDF document text
    • http://klinok-saintp.ru/files/defuzap.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/wemisinipupu.pdfIn PDF document text
    • http://newmob.it/userfiles/files/89138783119.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/54413258418.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/88481530162.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c631a0aab---40384238378.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/98756781569.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/vefusafagakibo.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/43980321309.pdfIn PDF document text
    • https://rippa.pt/files/file/bogibemuniki.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/napujogisipimofafikazuw.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/35276746900.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/61488285543.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/vidanudekisonojek.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/pugisogosuvazesika.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/xejemozudob.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_off0000be9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 18140 bytes
SHA-256: 348c4a18bbe7b880b63a56673c7a56d751166b134028208379b50b10cb0e77f6
font_02_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 10560 bytes
SHA-256: d6bb666d55156c3363e1c1b8923fc2f6694fffe570bc2ded81c0ea464cfbe2ec

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