Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8570d7ab5a04d7b…

MALICIOUS

PDF

92.6 KB Created: 2021-08-07 22:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3006783a05241bfbf725e3685ca6f9f3 SHA-1: f3fc4a98709757e76be05759d3e85f2ee4b71720 SHA-256: d8570d7ab5a04d7b290eeb40f60448d754785ff9a1fe4de3e48daaa9949a05e0
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/c521a83d76a4ffa836b1af7042fdaaa2/bopokagazudox.pdf In PDF document text
    • http://usaoxin.com/userfiles/2021-7/file/wironinujitapetagewawisi.pdfIn PDF document text
    • https://wittnebel.dk/file/redabakobutakamaruwijazi.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/e256bdfad6b36e9f1381a3931b685b06/10349726101.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/mofugasibelaxoxovowuke.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a9d2c07db78d83be3f8cc8b20280e213/70363360341.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac30b6d0326---wilepoli.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/35691377879.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/fd441c63d79aaec7ddc4cbbc1abc8a28/durototonotumaxelopi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/levokesafivivefezo.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/xigivogijufinakezuwi.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d2ff930e1bff132619b34aa1d80afdaf/tamovukefuba.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/razewowovijukosud.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/90301717236.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa3eb0ed1878581675c9731034d1c1f8/61718380473.pdfIn PDF document text
    • https://dm288.com/slicice/file/2204551781.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/85924763223.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16084da7738f30---sulorenu.pdfIn PDF document text
    • http://unseretochter.com/images/file/68128397495.pdfIn PDF document text
    • http://dogninja.com/userfiles/files/26736797840.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/bobolunilozigix.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087219e5af92---37124581615.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/73ec06e4d1e9af557b3cdd0742ebc244/sawutetegetopukolimug.pdfIn PDF document text
    • https://bloc-immo.com/images/65005617635.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/kexuwarogab.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/7d6383b4e4d508db4d4af059ce3a47e7/bilefovilimodilawo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ac76ae11---jalejexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=why+are+hydro+flask+water+bottles+so+popularPDF 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://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_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 16856 bytes
SHA-256: ad3a5cd82ba6c338147a458a38245eabf6b60ddf3845e67b0bddc7e405187cd0
font_01_sfnt_off0001316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14985 10924 bytes
SHA-256: 53d7fead1e4c8e188860e3166599e8970b77c3e12110e3068836bbc3dd400694

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