Malicious PDF — malware analysis report

Static analysis result for SHA-256 05233924a9bbb606…

MALICIOUS

PDF

76.6 KB Created: 2021-06-29 17:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 409001daf23be508a0607621d2066b7d SHA-1: c67afcfd1e1f6877443ed31c4576816b0589b4ce SHA-256: 05233924a9bbb606ee8613dc8493d32cb4fb725029cf3871b007f19faa22ac7b
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. These sites likely host phishing content or further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://landbondcorten.com/attachment/file/d2383e5c88e4fb692a560af8f2c5a097.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b61fbc6413fdcac950741c2124e4e6b1/gigem.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c42df47ef3a---solofuj.pdf
    • http://tfforming.ru/d/files/36898713248.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/vbh42856iv1am6ifmqn6arf513/sovufadir.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/bahh2m3aug0jtgbvujuua6sso9/lelubexefipozikibukesilo.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608f26a2542f0---77809277222.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f9c7a782775a6d9c6f3a09e28d65e6a4/9613567052.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbce320173---nejorajatomasoxojonamowe.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a2a79bd1d65e8df408d1d5a9e8fedbfb/nugawiseb.pdf
    • https://summit-christian-academy.org/scauserfiles/files/67518834011.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab76a30f125---84973913001.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/750a626b06760f16b30f750811f3efc9/12195589356.pdf
    • http://pwmtqatar.net/userfiles/file/83554654549.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1717d3712---putakenulizibisumoseko.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160766fbba9c4e---71174170674.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ce30dd01---nulobisutovudujaz.pdf
    • https://aiaciran.org/cache/fck_files/file/rozibewo.pdf
    • http://dongshengcable.com/images/upload/File/vivuwuduzobixonobu.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe5c397015---34224680810.pdf
    • http://atut-biuro.com/uploaded/file/zumeralaziwez.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160839c0e18a47---bepidi.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2s88cu6rcm4o9tdspuc3i9kd96/dumipularu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=act+71h+answers
    • http://pro.ovh.net/~tribuene/images/banque/file/bamevepexajisev.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_off0000cbda.bin
8dafa53433028fa85ed8aadc08e1909a0869cc0ed4f6c1ec0c4988f6dbdd0942
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDA 16256 bytes
font_01_sfnt_off0000f607.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 16792 bytes
font_02_sfnt_off00010e1e.bin
9ab12bb2fb8f7cc84c9f7f1e1dcbfc20ae503ec7c5557b7cb07a2e00692ff27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 10240 bytes