Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce53facd2b76024…

MALICIOUS

PDF

69.1 KB Created: 2021-09-29 01:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ffdd7b7d1ffc3faca2e7850ab550d732 SHA-1: fceec3b7089e06abe6d2956dce0b6555899bb0ef SHA-256: 6ce53facd2b760245fa0aac9431e69b79791b582a7b61d90dafe84c716e229f7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The 'utm_term' parameter in one URL suggests a lure related to 'minecraft game free download 2020'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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
  • 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://www.europesolidaire.eu/userfiles/files/33026177350.pdf In PDF document text
    • http://www.themixchange.com/userfiles/files/dazasizopir.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/gemitifinusuv.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/dv44aidhimq1nr3vgvkgin0766/79279835120.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/dovadexutorexanol.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/wokagofakizematuta.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/xepepenamediwurijog.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/13566686337.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/terugaxawo.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/82753353846.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/38195240002.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/bawuxi.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210913_181137.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/teseguxezogutedivas.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tapafawagobi.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/17947910784.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/rifikiloz.pdfIn PDF document text
    • http://gzpropellers.com/uploadfile/files/jejimokexamevitopire.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8a8169043e8a8a67c7598d84de947137/67042695833.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153835ee1bae---sizab.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/gatonaxab.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/30498007959.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/wirajupajovepubuzu.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/42578421358.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/28726999191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=minecraft+game+free+download+2020PDF 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_off0000afbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBD 10972 bytes
SHA-256: 85ff90d939c9878e6482bbc215c2a251c80c035f47e80db004e808e30ea8aadf
font_01_sfnt_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 14892 bytes
SHA-256: c2152205dc18af5065c2c40ce519309b2b760c880b9966857e39670f36b972c9
font_02_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1