Malicious PDF — malware analysis report

Static analysis result for SHA-256 9154e2afde612a30…

MALICIOUS

PDF

87.4 KB Created: 2021-08-12 17:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 2c6bfcf47dca67fb0cff451d72f42f02 SHA-1: 3fac633b25c4acecf5e9c76c1b23840e0a235a3f SHA-256: 9154e2afde612a30d7d82510b7ea98cfa49b5ffe3ef4e50e5f65111a401fbd49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://jsushibrea.com/uploads/files/75064131243.pdf In PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac23ab88eaf---30102229449.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9627c5adde97bf461a1095b1d957460a/mexaxajifasebi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/98950711433.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/kekovuzobedu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b265c89ed88---60985144960.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c1111245a6b---woviratakenerodexip.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/wojesibuvakanakogodawafo.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbdc7c56db8---gukavebivijubikewapaduv.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/285cc74eb9a4d026b7f98934a1b9e5c7/95728742113.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/75497618210.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210606_4E6FFBC240CB2445.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/titiwufivok.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/60780381134.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad84113dd08---48138196162.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9c93ee00877a34e286b10a1667a9a5b0/worukapulafel.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/15669233504.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096eed61fe07---32038420988.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/dfa37319a90dfcb64525c2249e7c31a1/dawosujawesinu.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/rurixifenapifumawesu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160979ebe09464---79021845711.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c52434cb48e---84469781075.pdfIn PDF document text
    • http://aimic.com/userfiles/file/supefekijerisogetobu.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/39383783258.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/1bvqe1pe0ihfj1bbj1a2gafgid/71757496891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ap+human+geography+unit+5+multiple+choice+questionsPDF 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_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 17836 bytes
SHA-256: 2658f8d73e4acab81669466f4548fb0b5c781071c78dc35f96a29b90b4a1d4f4
font_01_sfnt_off00011adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 11296 bytes
SHA-256: a65adce5372a289379a38ea6b444a2bb57fa3a1a6339dbe6e215973ecd366d4c
font_02_sfnt_off00013504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13504 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1