Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e1a7eb968dc68b…

MALICIOUS

PDF

114.2 KB Created: 2021-07-14 02:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c9bd14e49ec77620c8683408e4a7acd SHA-1: f27b2710c60c9d13dc1e5a65c6d279bbf63ff7d1 SHA-256: a2e1a7eb968dc68bf80ddcb241b1e01f08d80139f097328584605cbf44ba7453
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. ClamAV detected this file as a phishing trojan. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1431

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://planet-for-events.de/userfiles/file/71348297919.pdf In PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/nugarimow.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/12018513234.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/gigogexekaruxajumajerolad.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/gazabibewogurimirevot.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/pd6rktvn3do6k0ajlc5hs8s8r0/tovabevus.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/dufaneviwafadibetewitow.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/5sgvp7hisct8ujsssrh25jlga4/71465936827.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2b0426b7---67161812708.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/77277667110.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/99d7fd0c60ee85516d8f1bf31e8f54a8/tuduwenogadad.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/53880618956.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b9abd7186fce237434b6b555ac5ba22b/mumarufak.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/64493065635.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/laluxugumepu.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/717e9eade714b909868b30c7e6994b37/19825602046.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/fekabudititobuvosagono.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bcb2761a2---18193558500.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/xipemogu.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e60dc9b2d4---lubefavuzobogoro.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/77a958d50209c0510e43d2214eeb217e/76874921679.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5be7f595---kivatepikewanuraredariw.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/57499884885.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/4187365268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=16x16+texture+packPDF link annotation
    • 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_off00016af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF6 16724 bytes
SHA-256: 6dd20cf8fa899ce62daac318405897e40f43663246cb0e172b6846e00a76181b
font_01_sfnt_off00019640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19640 10252 bytes
SHA-256: 669190a5396f4a9623f721e80875c296d048264d64448086b23805b0d20a9d24
font_02_sfnt_off0001ad86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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