Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb14006c1425c86…

MALICIOUS

PDF

130.8 KB Created: 2021-09-12 04:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5b742f48a2e803ae5e60af3f9aef7a23 SHA-1: 34b88e114ae6fcca8cb38a1917789f1dbf95fc68 SHA-256: fbb14006c1425c86c26f5a2e9b755c17d14515e69c95939f11fa9565f84f0b52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further payloads. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://efuegypt.org/userfiles/file/leboxuwize.pdf In PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef1272005---85392967964.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/pijifevogowuna.pdfIn PDF document text
    • http://byecook.com/ckupload/files/zopopobazijexawe.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021091111121173499.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/vurorisol.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/sakobuwadixun.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/bodaketajafapijifozes.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5a90dbbb9---detopa.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ce4cfbb1b428b25a68489a632648f0a0/15396100129.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20219382408579.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/75247243981.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/54709541717.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/54208740384.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/oip481cbqf25pe5q1lo9qlt3ro/49473243747.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/88590042184.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210905194547.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/62741608333.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/81784946016.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210906213150.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/ribukag.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/39678527529.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1399d7014f03fa996cdc2c8b670fa2eb/gomamejudasobada.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/n95296mug3lfaaevp0mstmd0m6/20043366654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=telegram+delayed+messagePDF 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_off0001975e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1975E 20788 bytes
SHA-256: a69bed277f3e6528397a70ebcc292add678fde5426d8ecff1899d68532e592c7
font_01_sfnt_off0001ce41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE41 10256 bytes
SHA-256: 4826eb9c646b0480ea8accd6f170fbea48c9dc8179a811e55caf3369c66590b7
font_02_sfnt_off0001e524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1