Malicious PDF — malware analysis report

Static analysis result for SHA-256 02da95669d6094dd…

MALICIOUS

PDF

82.0 KB Created: 2021-08-19 11:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8964cad637aeea9b120e2084dd95ec3 SHA-1: bfd173475f2fcfeeded85d2b2aa12d0699421204 SHA-256: 02da95669d6094dd6e61a4fb22bdeb8e750277334a62d447377c89aa8c40667e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics as a link farm pointing to compromised websites, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document's structure and embedded URLs suggest an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b27c20bd4---85355418040.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/kekifutowixajizimoberiwu.pdf
    • http://scan3dsaigon.com/upload/files/99032836412.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d015d39f---petufa.pdf
    • http://efuturesthai.com/uploads/files/duduwukaxeliwezino.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ko0anrinq6ib1aige7a2td167h/71163933589.pdf
    • http://anandtouristcorporation.com/uploads/64793208969.pdf
    • http://collegium-connect.nl/ckupload/files/91403006338.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/kosamelejep.pdf
    • https://acryl-bg.com/userfiles/file/44804614420.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76729166c9---mibif.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/zuzidugesepujitozuli.pdf
    • https://panificiopasticceriabattaglia.it/file/kezagobedisejarazojexa.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/oo06o3fdo4sdnibsdees06u96t/89316681038.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607889ebacb91---mimovonefutegivi.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/ninotaxademakukumow.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f95a04b9cab---zodobude.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160797faa7236d---sarapefevabeverap.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f7ca2eb9---putukejarigokekonaforeviz.pdf
    • http://nppmaudaha.in/ckfinder/userfiles/files/jejawo.pdf
    • http://vtaky.sk/media/file/43787570609.pdf
    • https://whitesal.com/data/images/file/5484_20210524130115.pdf
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/kutanitijulupebawuduni.pdf
    • http://allprintusa.com/admin/images/file/towoduxuwevonixosatove.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=o+pr%C3%ADncipe+do+egito+completo+dublado+em+portugu%C3%AAs+assistir+gratis
    • 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_off0000d76d.bin
f688d83d8f690bbb5540a5b6d84f899c2e5d80ce340ed9a400536e97f1255140
pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 18192 bytes
font_01_sfnt_off00010400.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
font_02_sfnt_off00011c17.bin
90aba0eef3a57638ba11a784c4f20b65ca60e0635c5ed8471bcc805baad1d8e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 11344 bytes