Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e991255e9a047b…

MALICIOUS

PDF

72.1 KB Created: 2021-09-25 21:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fd459d4c309dfc6d011f5c7823af18b6 SHA-1: 6836818e7eb6b97f89d7e753105c84d9f04dcfff SHA-256: 13e991255e9a047bd6f6517573754918f0e291f7e3780ae32b7c9f7bb6e2f042
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4405

Heuristics 4

  • 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
  • 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 http://koreaticketland.com/userfile/file/rukuduzeliwejogulatexi.pdf In PDF document text
    • http://turinhotelcompany.com/userfiles/files/xedojuzip.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/5409457356.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/fuvazanopazo.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/14368947985.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/zizifa.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/vusawomuxi.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/64464941165.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/fugokanit.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021092016483670554.pdfIn PDF document text
    • http://aquatherm-graz.at/files/3082379840.pdfIn PDF document text
    • https://huanghecables.com/d/files/22098783620.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6707ec89e---96347652600.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/85596015648.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/51118048647.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/67919479388.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148b2246d316---4082700997.pdfIn PDF document text
    • http://dgjst.com/upfile/file/83676401587.pdfIn PDF document text
    • https://fratellifurloni.it/file/ziburabox.pdfIn PDF document text
    • http://telektrans.hu/editor_up/zavefub.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/vivivuzeruvu.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/97775937474.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/rogezejesijowideso.pdfIn PDF document text
    • http://elpijisystem.com/file/37184324284.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/vebixadarumuledevagukozev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=9now+apk+for+android+tvPDF link annotation
    • 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_off0000c1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F8 17708 bytes
SHA-256: fd3556be616942b076dbabcfd33e1be7f3092328fee7f471e2a845d3bee082f3
font_01_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10460 bytes
SHA-256: b7e0873f2d86c2a2dcc5f352686c2fa2d19705413caf085f041de43ec9c73822

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