Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12d7a063498420b…

MALICIOUS

PDF

91.2 KB Created: 2021-09-19 00:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0cb225ef3b2b679927e8765bbbc2ae0e SHA-1: e32c869cc89f111454081c3691b437377aaac60b SHA-256: f12d7a063498420b271a4d257a1091bcacd486a0ac64e96dc82fc445325301d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting an attempt to manipulate search engine results or distribute further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://wsbtitan.com/images/file/9465079049.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16131b10bb2366---8491866540.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/91628309367.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1631720980.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/35949248639.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/11561092239.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/93372955262.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/tikanogigiditi.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/nomexedo.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/lejeb.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/89585869.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/6990443465.pdfIn PDF document text
    • https://themalc.org/files/file/94300661782.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/kitek.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210910_A94C8F478D12FFBB.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/juvujuratasix.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/saboxatow.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/rogerolutafewovuzojonaxij.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/63892229363.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/dizimibibojomage.pdfIn PDF document text
    • http://kbchina.de/upload/tofujidojujes.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/sowixojivodujutoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tamilgun+new+hd+moviesPDF 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_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 10712 bytes
SHA-256: e163ac0340ad5de91aec8b41d2adf310916324fa774629fcfc11032a064d2eab
font_01_sfnt_off00011a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 17228 bytes
SHA-256: 4da0ce49726a682472fc038090c0cdd729b2a5b71937767dd377113775743d7c
font_02_sfnt_off000146f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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