Malicious PDF — malware analysis report

Static analysis result for SHA-256 6860a492cbbe4028…

MALICIOUS

PDF

74.7 KB Created: 2021-09-10 03:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 1f3eac76aebaaac0579b0683495bf300 SHA-1: c0e562035192d55ce0b9f18d87516c4fff0168e6 SHA-256: 6860a492cbbe402879fc67e57ae0875de6205c0ffd334a3cfeb7577c7a8cd8d0
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://alternatifhirdavat.com/upload/ckfinder/files/jiguwomulujoburenenepasur.pdf In PDF document text
    • https://frontivo.ro/userfiles/file/ditavigetilelosixo.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/17363599002.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/69727814288.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/93497227320.pdfIn PDF document text
    • http://debrecen.varosom.hu/userfiles/files/bisosujixogomom.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/66820131534.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/38182941500.pdfIn PDF document text
    • https://fratellifurloni.it/file/40291682393.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/ferumifoz.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/ritodakenaramib.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/walakopatiwerezaxibi.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/pabupabole.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/38245603436.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/2935003545.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/77140534403.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/tefinititivilamapujasu.pdfIn PDF document text
    • https://ijp2.com/contents/files/56755224952.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/posumuwanik.pdfIn PDF document text
    • https://hoongnau.com/upload/files/79479667243.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/miwepifomelu.pdfIn PDF document text
    • http://agilesolutions.in/uploads/fofugadoxobalilikezavimi.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/30964581993.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/dasukazerigamoponinetas.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/11190781200.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/nixozimutevakevizaripiwim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+restart+iphone+4+without+power+buttonPDF 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_off0000c07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88F 16744 bytes
SHA-256: 465e750521bd3ba8ec3ce4999f116d5ab8f4d47c6f0c36a470552d7c53e28637
font_02_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 10696 bytes
SHA-256: 62750e35b8ec1a2a82708016fa7f164b2810fe540813607e19709eb4411255ef

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