Malicious PDF — malware analysis report

Static analysis result for SHA-256 183f09e9b309fa45…

MALICIOUS

PDF

94.4 KB Created: 2021-09-02 12:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02b90f3d7d448045ac7d8e7b4bd3e16e SHA-1: c831c25dcfff68a9f00bbf03bfd5449d9b04f3fb SHA-256: 183f09e9b309fa45dd1ecf03d092ff0c5be466748769ee3abb0da199b2d17bb8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3423

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/06d058655e5c6544425bfc5a83304113/50215157393.pdf In PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/76977377102.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ade6264eed66d6b3b62464233921bb16/36165592942.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/93736654616.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790d2f5f3e2---81820688294.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/febutajuwegarogun.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/pidiguwug.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/xiwinareko.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/40503420283.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/gifozorifutik.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f18947a01c---92882612313.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/20641156ccee1fbf5198b3b6a25977dc/vifomizesuv.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/36778555492.pdfIn PDF document text
    • http://tianfonmm.com/d/files/43457487859.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/81279758979.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72d6e9e280---zavajoxekiriripepujexo.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/fobugavokilopun.pdfIn PDF document text
    • https://daismene.it/file/72707171354.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9ddea4g4unvehpn3irihmhmq0c/vitigix.pdfIn PDF document text
    • http://lachina.cn/upload/file/loxamofubejowo.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a664dd6215b63b0f727ab5108dac6ac7/govosadak.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/62350114481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=convert+to+adobe+pdf+not+working+right+clickPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 11144 bytes
SHA-256: bea47e984d2cb3fd33abbb0f28b2d2b78eb337c69b2b0280d4e103b60b5bb587
font_01_sfnt_off00013cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBB 19104 bytes
SHA-256: 20109e63b091229a8cf2e0ee279660040d0c1978f7bfb4e1a6045533bf3ed03c

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