Malicious PDF — malware analysis report

Static analysis result for SHA-256 48347673bdfce5bd…

MALICIOUS

PDF

88.0 KB Created: 2021-08-10 09:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 63a2d726059c5abb48380c170e6d0c1f SHA-1: 8ac8ef4cf9329b5d98f3c586e314b5ecc8bc8c25 SHA-256: 48347673bdfce5bd7008e3bb5c6f7d582da003166589108afc3867fd7045d1b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to websites that appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL analysis suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e4624c9f5---20940020107.pdf In PDF document text
    • http://sbcnepal.com/images/file/36678061663.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/74988753216.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/lonowomupixitivigixip.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1df9c5a0b4---71586252015.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/nbetdsurl3gc5a9iu86quok5c2/1051874243.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/53a078d6bca4f2fc3ecf19e8bd482087/wabawepuwigojagepixege.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/nofapuxezaj.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/gexuwuragumatebizal.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9c7b9ce35---13934756288.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ca05a7deb---10043068336.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f11d5cb5b9---godurewumenudasas.pdfIn PDF document text
    • http://servmed.net/userfiles/file/zibadapegiribala.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/89900962625.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/zukatavolib.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd46db9bed---barudebidivejuxazizir.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/71093784735.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/e1a4hkq4opi6q807gqkfjrsq9v/wajumagimaza.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/45150396829.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/96980227988ca7d2f9b713de9ba1d9d6/94073329964.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/25602344182.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/xujelafik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+raven+poem+themesPDF 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_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 16880 bytes
SHA-256: 1f9a4a292a4edf6940d6eba35fca120dd4660494102a0c052f73b0e6f06d9681
font_01_sfnt_off0001239a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB1 10408 bytes
SHA-256: 2891c0ee2566b3f1a71c82c4e1deeaa0bf5af3936e1459da4951e0f070bdb954

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