Malicious PDF — malware analysis report

Static analysis result for SHA-256 063ee3637f01795c…

MALICIOUS

PDF

88.3 KB Created: 2021-07-25 07:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e06da21536c7e62e5629aab1edb3aa53 SHA-1: 81590c5fc5140ccac67db46fdf727681640ef87a SHA-256: 063ee3637f01795c6908be2869e71f0cac7018b796351eace355e7d72d4819cf
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm intended to redirect users. The presence of these links indicates an attempt to direct users to malicious sites, likely for phishing or to download further malware.

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://melhi68.com/clients/69549/File/48709121020.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7osde3rt7gifshmel1lscd186u/gawexixutalukupijo.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/damufonona.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f37b10e8f77---73356013244.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609084e774b89---josip.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eda2bc51e---kanolovanusavax.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/eo9diq6i72bo7tkljcr8i0mgfk/75113746054.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7038ecc519d1acb8081aca859bcb11f4/89585089907.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ppualcc5gtevvufe39vc1ljf6d/17952333709.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6adb9ef3eed4a02c6c77c315f13f6191/65049163437.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2d506537f---birobukukodi.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/31427217521.pdfIn PDF document text
    • http://www.shadowrangers.live/img/files/zasosujurepapozulopet.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/nowifekesezixagusanone.pdfIn PDF document text
    • http://balone.net/_upload/file///13423105029.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/25438947973.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/90135088670.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/e4340c6b449910fabf4df4d5dbc1f83f/ketirogopagidebivaberumu.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/movizezukexaninavavup.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c1a35e016f08604dac026b85183efc9a/67970959350.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/mubimedotokejapabinir.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/43218829394.pdfIn PDF document text
    • http://mousike.it/img_ins/files/74731849033.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/losemegakopepuga.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/t1khgf0c798p4n2k73m1tau25k/44104191987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+bottom+loading+water+dispenserPDF 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_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 17412 bytes
SHA-256: 50f2c0338e88177c6d1b0996fcb6a43657750364b4ca718990ea99ea4dcd8ac8
font_01_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DC 11056 bytes
SHA-256: 6323f295d5878a3752d1b596001d14f0719df1fcd76c64e2cdb5f0d7dceca29e