Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ba9a7f8de57b09…

MALICIOUS

PDF

77.7 KB Created: 2021-06-09 00:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ff1a4bf2f6690e2099fafefd0cd3e14b SHA-1: bab96a116c99dde3b16f521123b37786d5e45053 SHA-256: 96ba9a7f8de57b0940471f271b5c5cd1d65c74dccdb75d5153026a68af876733
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of external URIs and compromised CMS upload links indicates a clear intent to redirect users to potentially harmful sites.

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=ib+math+ia+examples PDF link annotation
    • http://nowyhotelik.pl/userfiles/file/61923246011.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac947822d---26626395821.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7e3504e835e5394943625d946b1e0029/xuzodazopupegevup.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9bf7a20571a201e499781a84975a92d9/nowuvixozufujuxara.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/kvbee4o8kvaas719j3ovoh8h94/60422763140.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609465d96c32f---92746274299.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/4r0lqm9jtheqaee4lsmj0eeafk/nudiwolorosinofodomad.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16089ee0036932---7220286777.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/5fa836e4668583633ef8df4555371a8a/diramifewaj.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc88b303e---momogetuwonoleje.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/rerof.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607433329ed2b---dozikunutaxajozela.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/687ctg6ok2fn45omvo9ueqhtut/37803570861.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1orjmjiok961c1bdjf3onmpi8s/nizuxozibup.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1755a0c62---gukil.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f6226109ade1b1a24e802ac15ccdcf22/37603552068.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_off0000e664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 4680 bytes
SHA-256: 80ed45f935f893b6bfcd86342642b38bc4a0bf09850c7facde01936202edd49a
font_01_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 11204 bytes
SHA-256: 30f01b14c8159ee0ff3f60d31b46cd94540d9c922f15c53ba2dce5517c1f9017
font_02_sfnt_off00011c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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