Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e605e4bb83719d…

MALICIOUS

PDF

82.4 KB Created: 2021-07-22 04:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 51356457394db3a32549ffacc15c42b1 SHA-1: f308c74a36d322056eca5b0d606908ed8a84689a SHA-256: 07e605e4bb83719d6f4e572fe636855eaa4412b396b1ee65e49449ccf423b936
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/bke6aekdmrc9c746aajcmt87l5/41601853161.pdf In PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a0c9953ba---39286708696.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071a54e06d8a---48440424387.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/43289022710.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b90e49333d6---tekawex.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/48149588844.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/miretapuvegetekuzejexo.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/232518738.pdfIn PDF document text
    • http://www.emailposte.com/pictures/65685611089.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/xixazefanofi.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715ce615e95---nosil.pdfIn PDF document text
    • http://metallpress.ru/files/dixeso.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/luvufal.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/serokedavomet.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/boliboperoganokofope.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/82481125108.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/39203808823.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/1f93rqe6ucr3g97as6ie2o2t6l/xelezogub.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hednum0qlsovoi1k30ng4dhao3/90423917690.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160be6f8c73b6c---67228658529.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160860acc37b7f---94963678034.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/41517681852.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e26ad950a---tunilipufozujogunufanoso.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/luzuxerililezedidosun.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a511634c936---numepawenatanobakufifelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ps3+serial+number+locationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#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_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 10804 bytes
SHA-256: 9923430790ea090c9887ec9b0059546abbde56a40208b0c31bebdc61acacaa01
font_02_sfnt_off00011791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11791 16280 bytes
SHA-256: b75638ef278ad83330b2a38d8c3e7dbb7d430cf06b79b026ded3ff5bfcae0787

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