Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ea7a8f29140087…

MALICIOUS

PDF

94.2 KB Created: 2021-07-05 22:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 85ab0f52af539b4eeb5f9ceddb2e5442 SHA-1: 1b4487ff7141c43d6df484ab0e48644d24f2fc75 SHA-256: 67ea7a8f29140087a759994a2a00de62373b30559a696cd333f9b5acb1ee269a
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. The presence of multiple unknown URLs further supports this, indicating a potential phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nolimitscenter.be/peausitive/images/FCKeditor/file/2122331775.pdf In PDF document text
    • http://abacusnancy.com/userfiles/file/kukutazit.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8af7ab4c---76754449722.pdfIn PDF document text
    • http://accronline.com/userfiles/file/xutibavozigesubo.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/12030132950.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/47030510746.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8e656e367b031a2362592c0131d0e690/rafedesekili.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/wuxetajurokiva.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5544f498a92c5c9c7452a309d64d22a2/43431655147.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e127c6bd70e---savemelarulebavesomupi.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/ziwaxuso.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/wovimegalokejobekavedalev.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/nuwaxajezo.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/65520704328.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/889ca56bd9625ef3c0cb2f67b9919fec/38005915972.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c243b030d92b55adcb940b39564a02c4/14102663638.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/jesufupuvurogemizagubix.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbnf01p3hq0ad6qsueg0su8r7i/fuzopetirid.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/misenipo.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8mi50f7ithin2hi6c8ogivgl17/24490391229.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/k2oqg3bdc8bcr8b3sihktfjil8/lapizeveret.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/e64874efbac764bc2e4ac731f388890a/31304996459.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/tagiwal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=questions+and+answers+on+musicPDF 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_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 10732 bytes
SHA-256: b956aa81cceda6609f9b5b791276e861fc18e921d5e3fa99b6c52d5ac05c5ed7
font_01_sfnt_off000113f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C02 30172 bytes
SHA-256: e2959e9c3836e5eed4184e0311a7f66b63b39d844f33203a2b8580be7d01cb0b

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