Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edbbb2a10f9d141…

MALICIOUS

PDF

90.3 KB Created: 2021-07-20 18:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6449c4907470653e28c44a2def190f8f SHA-1: 3664f489c0834a952b7f28897aee642a9ce95cf5 SHA-256: 2edbbb2a10f9d1417354328345f1ed18be98dab2a82084803813a470b6cee69d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host malicious content or redirect users to phishing pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests these links are part of a scheme to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/drtdgnc11dcc4lm02fo88h6nl2/giwujawatowidodoke.pdf In PDF document text
    • http://igigeothermal.jp/userfiles/file/76870723890.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/46c16c588bfb3d80f2cae3f6f9d00af1/xunobivorazolezorawikew.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/8soursbfhoajtoi5f4cjo5so05/72091881719.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/88902289983.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a92e268185f---20413717509.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7e1ebc0860bbf4dbc8ed091a0e18a08a/79178838274.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/12836297322.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac92f43708d---65672848072.pdfIn PDF document text
    • http://alcantara.cz/data/file/pibusufejevi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e835263db---3299600255.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/53565174562.pdfIn PDF document text
    • http://charivne.info/images/file/bitasefinej.pdfIn PDF document text
    • https://jurad.eu/files/file/57730615358.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/qnop3rde915r6esb10gofehb15/13489809844.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160949e48ecca2---63129157035.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/73819756528.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5b92c6509---2511054641.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/6cdc2856ba64df72caca67ab149a1fc0/fazuw.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb06b745c---logezeva.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/dc6ggdp8gi1ojm0g491r6mi413/79180185237.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a3c2a5ffc---rasegirujavu.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ec16f0274---13882706651.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/tevekuzotozetizoxa.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2811de5a0a---34739929335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=zebra+finch+life+cyclePDF 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_off00010132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 16952 bytes
SHA-256: 46b4feb2e460c923da108c3e8198f1a6e1389469bb06b63ee423dc21d6e15813
font_01_sfnt_off00012cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDC 10264 bytes
SHA-256: 843fb266f8e0487ff6a47b21aee958a189573edef986f55b11c34eb4c8aa52f0
font_02_sfnt_off000143d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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