Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67e46281ba8bb2f…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 91111f7e16aa0e3263f313dd9626b18d SHA-1: 5c5f5fdd64db22523bd4e293e6e3bb4d3186f0db SHA-256: d67e46281ba8bb2fc6ad6c5cdf66b660a0033bcab97bb6c8995ad0f7e38654f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to potentially compromised websites, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://drafthe.ru/uplcv?utm_term=tantra+sexualidad+sagrada+libro+pdf PDF link annotation
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d996108f4d8---73550889791.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/38875754430.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5eb455e7a43ef9ef457939171368da3b/65440377209.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/48h9f31m1jbnua8v5oipci5m7v/90849536872.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/eab8ec93d0b64c9f7c42ee079cd4f2d8/jiperupu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a76e3555437---mefenakeguzobonotazobibi.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210615210517.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/doxeni.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/19df3bf737513020948a926d731114f4/suvenule.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/kfsmttkuf5fu861ut3op3dlvpn/velobaresefijozigo.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/15742687245.pdfIn PDF document text
    • http://change4best.ru/upload/file/sosomodukarejeta.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/45170609268.pdfIn PDF document text
    • http://finchamauto.com/pics/guxasuxobipaxigutesikiger.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/62594429186.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a433497c1---28387434055.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/rerijanoj.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/2628915076.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/19308348364.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf827720e7---25049336868.pdfIn PDF document text
    • http://blatt-gruen.ch/files/gifetetukov.pdfIn PDF document text
    • https://esz.jp/img/editor/files/wavolejozekupa.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a01e925b0---nejakafasibumeximudu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ca90140c---96882973856.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/wejifusojukedozebutadag.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/33790072054.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 10976 bytes
SHA-256: b10dcd794fd774e311646ef1412ee3cdd062e96d647d8e8b73d49956c5d2518e
font_02_sfnt_off00011735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11735 18512 bytes
SHA-256: 5b858ba84d6ef650eb40a33fd1f3a61391fc661c1b8896db4313a8ae0fe436c3

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