Malicious PDF — malware analysis report

Static analysis result for SHA-256 9977092733823005…

MALICIOUS

PDF

78.0 KB Created: 2021-08-03 02:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 728a6b59cf782151d04427eaf36d5cb6 SHA-1: c1c617bc4c0865372cd4d6cca1e8e87abe209d7c SHA-256: 9977092733823005407660b8eade02feeb898309a7cf473d41d925dec594610a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=pyar+deewana+hota+hai+mastana+hota+hai+guitar+chords
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/94f3dc3a667624cc45c3cc0b90da578a/26319417345.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/h7dtq5qta96bdm9h08m8nbkbf8/89926166262.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608387b92d0ac---woxedupeko.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/58172612887.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608102ae916e3---fizekijulimozuverejire.pdf
    • https://observatoire-omic.org/documents/file/bolibipore.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb58aaf71---85933433617.pdf
    • http://vagtteam.dk/userfiles/Files/49871775184.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089929aa8773---69597350382.pdf
    • https://digireg.com/upload/44201533874.pdf
    • https://gancza-yacht.pl/userfiles/file/95845752463.pdf
    • http://edgecs.net/documents/2597425248.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079ae5f17870---5308247526.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16204554909259.pdf
    • http://www.jindatunnel.com/up_files/file/73391767392.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/615679b196b3604dab4f9a91ab3227f5/77689603132.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0494bed8---nopojuguxovurazesawun.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c706ad52e---19339936819.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e6d78e2bd---58926146089.pdf
    • https://pointvirgule.ca/upload/editor/file/webivomogupijum.pdf
    • https://satuldelut.ro/ckfinder/userfiles/files/migitafigobabubisuzataw.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ba3d76b70226c7437c60c06c9cfd9d41/6424169600.pdf
    • https://naoshima-habitant.com/momewelapulefexoraso.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_off0000cc5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5F 16792 bytes
font_01_sfnt_off0000e476.bin
afd8c31c1e27a457cb056b043689a0a04bf068b13055206a764be07c417b3aee
pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 11072 bytes
font_02_sfnt_off0000fdfc.bin
9b25f7bd4216f8c4e1894f11e2cfd2e4573b9af6c066ddc06ead47f1cc8497c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 16652 bytes