Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c96a2caf6ecf60…

MALICIOUS

PDF

354.3 KB Created: 2021-06-27 05:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4da292d1069a432e1e4980c500ee95e9 SHA-1: 53485c879cf7869636b7bcd2e8a3023e53148ab3 SHA-256: 88c96a2caf6ecf6048fad7b688bc13f1d49bac2b5746249e32a583cb1f2562f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of external URIs and a link farm to compromised CMS uploads suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9799

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.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949a2f6ea8b---82876062046.pdf
    • http://chromoink.com/updates/file/wagofasokujisakidodolu.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/e4cef6b7d30cb39bfa5b0b2db28530f8/97245858170.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608041a46d7f5---dumadobasiwize.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b81abae5---43964440361.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba9bb28c93---tagokujuwalowakofetixaxav.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/5e7gplv7gfcrdg4ie66b0gc2nb/wipeta.pdf
    • http://assistance.uz/images/shared/file/suvel.pdf
    • http://nanumed.ro/uploads/files/35825830069.pdf
    • https://digireg.pl/upload/67065908720.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2aad7e5e872e9196475c9086dcbcc482/17017859920.pdf
    • http://bioscipublisher.com/files/upfiles/file/48523432213.pdf
    • http://ngnjl.com/userfiles/files/20140650897.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb670dc73---41590951098.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/3jjq1kn36l77jh87o6965qtaga/nagijunug.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9d32c794c---32574882923.pdf
    • http://bhhangkhong.com/upload/images/files/71200478922.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719880c22c1---felogobubosiludetuwawanaz.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb78759913---fulagobuvipuxamezep.pdf
    • http://ligneus.hu/upload/file/42275066504.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/d508e0e192f9d6d0010aca139943a801/kizupilome.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb9b20f47f---ruworudutukudufiposudit.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077575ad18e4---96852298925.pdf
    • http://verypool.cn/images/upload/File/22411751035.pdf
    • http://acpiindia.com/userfiles/file/vakedevapob.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=light+in+the+piazza+bootleg
    • 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_off0005142c.bin
712a59eee875ad9a1d52236e34cdbeccb1783ccb6283bcad507cc99a4cf1059b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5142C 21024 bytes
font_01_sfnt_off000549a9.bin
610a0147340081d2b4fd662781ab65cf330ff09af25308d46eb334a12b28fea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549A9 10420 bytes
font_02_sfnt_off000560f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560F3 16792 bytes

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