Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69dd27077454491…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 15:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41cc8623ea9b0d4754cd8748d243f48f SHA-1: 5ba21ecf00cd2d19df83d365e8b7e064e17fdd8e SHA-256: f69dd27077454491779ccf8e064926c42d1a248273a447da5c7f01d05ec18470
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=gout+and+toes
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a38c8673---kinajoxijedumobava.pdf
    • http://davidlbrooks.com/clients/868292/File/85571054782.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9da7be16e0841a7bca33822d3c0f5120/64027485995.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799bd968a56---20205534063.pdf
    • http://stardentalcare.org/userfiles/file/mobiz.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8caf5a190a---27038691044.pdf
    • http://aaaexpressheating.com/userfiles/file/60832077945.pdf
    • http://riceart.ir/basefile/files/kuvib.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc0c78522c---12131967529.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa58d61cd3---tevupinemof.pdf
    • http://innotack.com/userfiles/files/57262740761.pdf
    • http://thedigitalscorecard.com/userfiles/files/56768918733.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/cdbf644c335500378ea84c4c15a30bc0/41399181858.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/025178044bc90a3a84b051d99e7b6af3/welefuzeselit.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b9a778e95ffd8b638a610a9d6dcae84/65685737321.pdf
    • http://iwishop.hu/file/gasugefis.pdf
    • http://wellfoto.cz/pictures/files/botuwibegofesesujunizela.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607be4dbe69ea---22539684221.pdf
    • http://bydnjl.com/userfiles/files/53843637004.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fcb04e31f952fb71f317905b59f097b2/83332678544.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b744d4c23ca---kuzomovodajuxez.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c897ccea3---roxuwasokujulitawuw.pdf
    • http://goref.ru/files/file/96115173728.pdf
    • http://animalscipublisher.com/files/upfiles/file/75725498608.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee94.bin
ea2110d02f5420fd4be1496f1d2c6fa0555a09415e62cbb5bfcb1781b2f8a427
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 17136 bytes
font_01_sfnt_off00011ba0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA0 16792 bytes
font_02_sfnt_off000133b7.bin
557d3f9c6513bdc98d92e8bed0d24d7b4d835f97686c662be2c1ac14fc61b770
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B7 10140 bytes