Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2ba746b7d7687c…

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 06:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bc7162c97105fb0181b1df80979395a1 SHA-1: a09e7a97887b68ed06dd9feb6cdbd01ef044d18a SHA-256: 0d2ba746b7d7687c1b4e2c6193fcb3cb3ff4d05b13224af99fda53e34cb5cf26
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ymy-tea.tw/upload/files/4409976648.pdf In PDF document text
    • http://telecycling.org/files/file/saxizoxepegebelibodopore.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/tamemu.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/vekidifaw.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/72435778962.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/gafewamex.pdfIn PDF document text
    • https://zagi.hr/files/68498439023.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/76903793074.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210912175009.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/61484069571.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/3631317013.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5mcgurtnhamc1i576djlsa0fua/25361655756.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/80221563983.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210908_004909.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef8e732c9c---14558685550.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/28734376699.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/jevuzidolo.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/tuvasej.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/61615947784.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/gepuxopa.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/12154718158.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/44006912345.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/gidupagosefivawuvev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=gta+6+ppsspp+isoPDF 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_off0000d86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 17312 bytes
SHA-256: ab4fb37740c9b674db690a7598e645f427ea1d93d0e4f1a4182012ec2c22020f
font_01_sfnt_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 10072 bytes
SHA-256: 483fd7207985cb17288d1438973d24dab11ee6db1b6c2bd67232bdf3dce90a61