Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ae39e53caf829c…

MALICIOUS

PDF

73.6 KB Created: 2021-06-28 16:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 039e2f0f81f85954bd7ebc1277259e4e SHA-1: 5e2ebd7fd08229bcdbd4b8c92c0e16db38339b4f SHA-256: 00ae39e53caf829cc4b22a65370c19bcfd8cf6497e1cc7b4cf275f1d1b41ed73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to WordPress upload directories on various domains, suggesting it's a link farm designed to redirect users to malicious content. The presence of these links and the detection signatures indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/4309e650e86045752b7b84dc4a802e69/26948261000.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b21c821f07fb9956f6a1c380bebde2f7/rokijijugaguf.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b296eaba29---62619614799.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16089e5d65a052---novojemezewamidegilav.pdf
    • https://pcstaiwan.com/ckfinder/userfiles/files/dosivuwepinalozur.pdf
    • http://garderoba.sk/images/_file/vexomolosarejevojube.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/577c03cca170b2a472c245dac0d6c056/64160766119.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ae2832b17---wimaxebimo.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/b7cm6gpoao92cd0d2ebta9dksp/30003536628.pdf
    • https://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/51537674768.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/d63118a7b1fb42fa04c95b0e3a8324e5/28556888883.pdf
    • http://adacu.org/userfiles/file/20210617200216.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/11851ce19e496f8501a57a9564be56f9/47502544979.pdf
    • http://mgocsm.in/userfiles/file/kiditagujedudogifudiret.pdf
    • http://architettotamborra.eu/userfiles/files/12003077595.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/940f708c917aa55eddbac237103a0469/mosoxotaziso.pdf
    • http://silesiacapital.eu/data/file/tuwogi.pdf
    • http://cl-pub.com/files/files/wuruwozolonivagov.pdf
    • https://arhometutor.com/userfiles/file/dobofunowuparajexu.pdf
    • http://goldartline.ua/userfiles/file/rakufenu.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609063a03ebeb---26029596162.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/b5f9a3a34db409fc33826aac5759f218/61886954045.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/9c24nj6hrv983tmnghlfmi8jb6/pedepudunod.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1955c90e---78291782730.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/jne6c9al313lp1aqmuhq50u0n9/jikujewanibosiride.pdf
    • http://imaginove.eu/data/Files/litixozajulimamufav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=which+statement+is+true+about+milliliters+and+liters
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc27.bin
558ab97f53c0457917d9b0c9854d50a7579333a8f58debec976b5beca5e8effd
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC27 10868 bytes
font_01_sfnt_off0000d50e.bin
06317a6fbadeb7b2f6e5afa47267df88f66acdb01c7e829ebf4fb36321282433
pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 16028 bytes
font_02_sfnt_off0000fe9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 16792 bytes