Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0bba4b6e4ac9b5…

MALICIOUS

PDF

78.7 KB Created: 2021-10-02 14:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c38dc80154db0acb07f4875aed603b9f SHA-1: ffee8193d66aaed54148952645e0473e8402c179 SHA-256: 8e0bba4b6e4ac9b5141cb33be19752784530015f044de262288f4c032ae8149b
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, indicating it likely exploits a vulnerability or employs social engineering. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF's primary purpose is to redirect users to a collection of other links, likely for phishing or malware distribution. The presence of numerous unknown URLs further supports this, indicating a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://phamtrangia.com/upload/files/gegasigamekusavopum.pdf In PDF document text
    • http://kingkady.cn/uploadfile/files/32798072576.pdfIn PDF document text
    • https://carpenterstouchnj.supremeroi.com/FCKeditor/file/34369151704.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/totaxapubezaj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b57915561---51391659530.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/2331977400.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/sados.pdfIn PDF document text
    • http://xn--80aer5aza.xn--7-4tbj3b.xn--p1ai/ckfinder/userfiles/files/pisoba.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/gogopugapezosajulak.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/90363929769.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/gezijonogugoxujixol.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/24784037031.pdfIn PDF document text
    • http://hbaoge.com/upload/files/34296291884.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/balapulifuf.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/rurunuvukugi.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613065b31bb19---vuligenobafubonubom.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/78484205025.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/vamorola.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/jojavasisaralufe.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/zipidosutepaxuxebak.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17179430887.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/25383044159.pdfIn PDF document text
    • http://sjhtractor.com/d/files/wekuvok.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/49621947811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=everyman+and+medieval+miracle+plays+pdfPDF 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_off0000c62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 20848 bytes
SHA-256: d326e0b0143d363414244ceb7af7e09e3ce4b8dcbe54e19abef96d8a33bbbd3e
font_02_sfnt_off00011433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11433 10724 bytes
SHA-256: a658d432decee1a0153043ff672108997379305ac0dbab9f5ed6f376a8e5928b