Malicious PDF — malware analysis report

Static analysis result for SHA-256 02423f0afdf58a03…

MALICIOUS

PDF

94.2 KB Created: 2021-06-22 23:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc240de777ee4b83d46baefc119e08f3 SHA-1: 431682870bc1e152a3089b74cbb5d4ad08fa9739 SHA-256: 02423f0afdf58a031e764b76967dab09687bdc41c627b958edf21a96063ccb3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://nomylo.ru/uplcv?utm_term=in+another+world+with+my+smartphone+season+2+release
    • http://geodez.com/pliki/file/71835641711.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853b83cd2c3---vakoduze.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbc787b08f---delokadiwuzizoxujula.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607441bdcfca3---26743388387.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/184c6rpbkrn3g4s5urot0q1vdv/31022850672.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/146c48770d720d3fb75b0dc6a77ad69b/vaxegala.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3302fb7b94bd0155857bcfa47d65e0c/99684184165.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e47b4eb9c1---98742070577.pdf
    • http://gustosandvic.com/ckfinder/userfiles/files/fapafim.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/29696431853.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090e4a98d0b7---wevilubofib.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/giregugov.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9ee62fe0---62866375185.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6c7231c46fa9288273cc8c2ddbacea73/geratafigizaditola.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072025b92ac1---dinoxifipeg.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00ec1cd00---51962643469.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084168059561---gifogasiwolibi.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e82a07313---tixasodes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25a.bin
799bd6ca100f0d2d5e3f56782d2af67c3769bd0375cf81eda87c8f8e5c911146
pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 19068 bytes
font_01_sfnt_off00012f4e.bin
b530af9f2ea885cb0445d19235ffbfb4bb8e70bbf1dafed666907a53e42b5854
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 5460 bytes
font_02_sfnt_off000141cc.bin
93a937522cb4eb888aa0a5c68abda39dc50d3f6e18093e25f57ccdda746c0eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x141CC 12544 bytes