Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd486a08dfefb478…

MALICIOUS

PDF

71.7 KB Created: 2021-05-29 02:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ea0ace69132a6a0d9096d94c8b1f910e SHA-1: ea110bac191fa175d92801a2e2f3fa3c91c91951 SHA-256: bd486a08dfefb478e99f40410107da0c77e99e8d0226a6ebbded045175f7850d
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via these links. The document body itself is largely unreadable, but the presence of numerous external links is the primary indicator 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 http://incucinaconalberta.com/userfiles/files/duvoraf.pdf In PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8e49a9559---wamubugakegarofuva.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s68jbjrkj9o9kei41h5jp7vefb/molaniwoditobataxizemikik.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/neduwewepi.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/gawobomebu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1b70665f---xifupejutuj.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797f526a90f---gowevevakumotuvite.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e196ff2d60---givusibupufix.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/7963744256.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac05ee0301---luvok.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a60d952b9---fuxabatemakizorebopun.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/98b9a8fd8ebc99d31ecb6de1dc905ba4/zabemofixejaguligul.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/efbc05e0175c401693769e6ab90729f9/xiburulodujegileforad.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609115d12f637---96123872723.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/52516355983.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/869758cd9fd97a9d7065c90e4aeb0881/kisuxuvuleda.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/4ilqv15hiv6i5915aispjpaed2/47755509463.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2i4v5m6j5evchqjm0ik3botd02/norodijeziwunuruselufov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=imagery+in+lord+of+the+flies+chapter+10PDF link annotation
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 5804 bytes
SHA-256: 4874a4fa199471d4a781b8eff75e56722e0fa669d7c0de16a3547823e8af8880
font_01_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 10848 bytes
SHA-256: b782df59b59b4891390f7b67fb967c26e4258460531cc396b40df615b0e1d950

Open this report in the interactive analyzer, or submit your own file for analysis.