Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae0e6f187775c74…

MALICIOUS

PDF

68.1 KB Created: 2021-05-10 11:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9199832f55d71eba3897c7507346435f SHA-1: 67e7f4ee6eec819aa293fbd47dc47b7bc972c07b SHA-256: eae0e6f187775c7443c073f2d8d52b6328839f0c17faa4f9d8815a131da704ef
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9710

Heuristics 5

  • 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
  • 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1307f00e4---36990217280.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/1m40stuleaul910gf6leb5b1a6/gufofiwumel.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab64424a8---vezevabununafef.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5855d35c29a5eccd95d3b4b2dc950726/basegupo.pdf
    • https://audit-advisers.com/userfiles/file/21003425054.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d011b4e995---ribagigibezezore.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e8552431---69219874347.pdf
    • http://softwarefactory.nl/images/file/56413196741.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160845f741ffa9---vivabukodesabirir.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9c9ae9c0b---wumesefeserixiwepesavipa.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ef8884fee---tuvosuvopomoloxa.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834971de75d---29560034759.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/iovn69g7fgp3id5l3kkfb0tn81/96638624241.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/osedonc1buf1mb09rfjulb7sii/tejezamevima.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160983c43d992f---kikanojo.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2c530fcbce9dee9ff49ec065083e351a/xenedenoboxafebozin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=aio+er+apk
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e667.bin
6e86255d73fd9fbb679d690ba4a56e87420605ece45e3e40732e56edab0eef52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 4656 bytes

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