Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee2d863ed015451…

MALICIOUS

PDF

69.1 KB Created: 2021-09-20 02:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 611baf1b6ca78aca7b6f59aaea477981 SHA-1: fe4a1b47b4f608c97da27102486be088d3bf6c4d SHA-256: 3ee2d863ed015451fbd0072276aedf7026a5e527a92bc685f220740c7cfbfd6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to potentially suspicious domains, suggesting it functions as a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a structure designed to distribute links across various hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://mariellatriolo.it/public/file/fixogudugajuj.pdf In PDF document text
    • http://myphammonly.com/luutru/files/68788773732.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/22570788070.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/wukisaponapetarawopamizu.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/17156808010.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/33641560405.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/paluwebezalov.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/39716374931.pdfIn PDF document text
    • http://esistore.de/userfiles/file/20479294218.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/rafetisanu.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/kulevekek.pdfIn PDF document text
    • https://kawanmto.org/contents/files/84947185154.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/81586059227.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/nasezuwezuzol.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16147c7d623849---sonafubo.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/toxaxamobudu.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/17968716097.pdfIn PDF document text
    • https://claudiodituri.it/uploads/69872439897.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/69306753124.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/jidavimuz.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/50809873784.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/88495258212.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/94898191001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=android+emoji+translatorPDF 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_off0000b3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C4 10520 bytes
SHA-256: a81150e4e1331ed97d140934310d5f8f430ae7bbdd0bfe604606838c3b561f89
font_01_sfnt_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 14212 bytes
SHA-256: 6cb4bdeb646d944c11e756bb80044d0bd07a26f65bf091b2122a20a908713a5d
font_02_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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