Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f4d48dfe1ada2e…

MALICIOUS

PDF

87.5 KB Created: 2021-06-27 01:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67d41c7d8a59a9066a640e5e961c25a6 SHA-1: a12230f27b71cb735abe3a5d21d64453a7c0f622 SHA-256: 40f4d48dfe1ada2e0b440b2863e4761d71327689292ef521fe6f02eba8e7933b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, a common tactic for distributing malware or hosting phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure suggests the PDF's primary function is to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://abwcoliseum.com/uploads/files/kawarebiju.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3afe5109e---xawasesogusawaponunowi.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/27314442595ef03a036e2137d2cf4874/40077881363.pdf
    • http://3suntech.com/UploadFile/file/20210612191429861.pdf
    • http://www.gonouvellezelande.com/files/pudapafulobevubo.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1701c848e9---15384571127.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/wexofusetezewesikupu.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/sovoliw.pdf
    • http://riggi.ru/userfiles/file/20449416503.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f40a37b7dd---99037451349.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878fc1ccdc5---sowowuk.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/mowogitapumebedase.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d80a4250117370bd25e62abd34cd3bc8/99132782107.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b85e2452f5fa3ae25a123429b34159e0/59862480478.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77b62657d6---mebasete.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/85d28d91b2120cd94e44d7f2281c8c78/xafolisalizufegokepijuj.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ba06077b---3351144447.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1da56f7794f7380dcbef4e2caa57f262/21694387191.pdf
    • http://growlink.biz/userfiles/file/67224841185.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609657a8060b2---getuwukoris.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093b53d6f09f---8529852105.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c86ace20d---mufixaneluguxubizupu.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c4408455b---5315041097.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/6g0uh73ivdp34bvt308p86otc0/lajilatosax.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ozymandias+poem+questions+and+answers
    • 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_off0000f238.bin
b6ff1b2afe86c944e0a1adbdde62864cad825f4b402307d1597ffd03f9362cda
pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 11036 bytes
font_01_sfnt_off00010bca.bin
d09904c9ab63af1fb034a37d5d97e5102e5d1f90f5b42193886de7eafbfbcbf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCA 17256 bytes
font_02_sfnt_off0001389b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1389B 16792 bytes