Malicious PDF — malware analysis report

Static analysis result for SHA-256 c854974f0b5ff6d2…

MALICIOUS

PDF

76.9 KB Created: 2021-06-24 05:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 075bcafebdc93390f158da882ca34865 SHA-1: cacffae22d4069da76650d87dbaadc87b2631e2f SHA-256: c854974f0b5ff6d2ca5f3dac6cddfa24d97b431eb6f887ea1f6d2f1bde5368be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to potentially compromised websites, 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 malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/uplcv?utm_term=automatic+vs+manual+cars+in+india PDF link annotation
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/s97indk73mhf2sbivbt1suk42m/91380488992.pdfIn PDF document text
    • http://bulmarconsult.com/files/nasis.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/padinejubefa.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/36053648647.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/89847939942.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/ee3d91c01c892ec08344d7a455216276/nezipejuxemifi.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/dasirubawejiramukuk.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/268b71f98923846bfa5bfcf76409dfb5/19985057310.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160794b2b92940---nepikegobugake.pdfIn PDF document text
    • https://numberonerevolution.it/file/samexuvepezu.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d15c6e3bae---98656047734.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a566749ec0fce061153b79c64f368901/sunivivajifeku.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/mepumefuzaledos.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abfbaab312---zajelevipexugoriguwikiseb.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67de26a6f8---29305984504.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2aad7e5e872e9196475c9086dcbcc482/17017859920.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aba171bd1d---pofukasosu.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/46a26cb19c9946cac26a20521193c632/sumolezofokaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 4900 bytes
SHA-256: a5d485fac1fecbf91886a3ee9fec24cd69e34d631c8205b90fce8e6ceb57a889
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10324 bytes
SHA-256: db2439e50eb5c3aa9ce0f9e6dbf96dbce87727c97aab8dc53cdb22eeb8a13a59
font_02_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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