Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bcabe447d24ee7…

MALICIOUS

PDF

85.5 KB Created: 2021-09-05 17:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 210946b00b7909548d2c0448d648cf72 SHA-1: fa32fa7f66762e1094c9e919e572a9952c438706 SHA-256: f7bcabe447d24ee70cc639281b0871c0cf9a39f30d68fcafa053d864f3aeeb78
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=hyundai+elantra+touring+2011+owners+manual PDF link annotation
    • https://freebcard.com/ckfinder/userfiles/files/6447471336.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39257987f---69897463864.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/7698958997.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/19316795073.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/46252893414.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/69444086275.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080a29f8eaa2---52904168488.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/xagopivikovitibid.pdfIn PDF document text
    • http://rld-carbon.ru/file/fivugu.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/73806031552.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/63479214811.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/judatepa.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5ba1e22a5---wedevubokeniku.pdfIn PDF document text
    • http://vina2002.com/uploads/files/momavomefupufikoled.pdfIn PDF document text
    • https://jucariicopilasi.ro/app/webroot/files/userfiles/files/refof.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160996f3ce8732---88040308209.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/445b8f3eec428936cbcc74fab0e3c994/95262685335.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/minezokajizezubovuxudado.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/59084994759.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/631305510.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/9t9digfqavsecvag4pmcbis168/vewudagabexutodape.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD202 18060 bytes
SHA-256: b3ec9c6e1c647609c034541c13d35c0a054fc92e7d8d9cdc2ce71ec633fe0b5e
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 16208 bytes
SHA-256: cc18dd29c0e954ccb64aafd737ebae4efd7f61c45ca6cadf77ebf227b688c97a
font_03_sfnt_off00012dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBB 11176 bytes
SHA-256: 402419eff23a4098af09d5c723a71e31382d6785b700c58df8a044221deceabb

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