Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a279c296714b18…

MALICIOUS

PDF

75.0 KB Created: 2021-09-06 05:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5b66642448eff30b24066b635dd80b57 SHA-1: 015b20cfc7da6075cd0ac8e3567966f37fa9bb5d SHA-256: e7a279c296714b185157dd1dbbed212a22d6728b9385d3a8fb1a2bac9613473b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://queure.ru/uplcv?utm_term=jenn+air+oven+parts+manual PDF link annotation
    • http://kiszelyugyvediiroda.hu/docs/file/kopopo.pdfIn PDF document text
    • http://pradakshinam.com/fck_uploads/file/11722656826.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6573ed0a50fe1fd3d308374ffd8ce3f9/xipibukaxabexojifefube.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/lebosino.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/51373365199.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e78e53f00---42440311311.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/kobutipebedikav.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/zudemezakenogogedusofelem.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/90301717236.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/pebure.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/lovojitiwudokigesu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf428dfece---81196971059.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be160debea9---59387379817.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/70939106527.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607145bd816ed---58163259254.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160810797de19e---zimirulego.pdfIn PDF document text
    • http://yuli-china.ru/d/files/galeritewisiwufomopolebal.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-8/20210708131524567942.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/0e2ee9eff2533264e4b37b61a5341c26/29656102239.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/78643508598.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/53958007687.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ced62f527ba---fumisinedubew.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/8a87a019d7389c1c6147cfdfb30f5e01/nixoxidufabaju.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec54590be6---37489428649.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/nuvupajij.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/nt4fjbu7s6lanlh80rqv28sko3/89097008989.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161117763ee238---2127157679.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_off0000c06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06D 16864 bytes
SHA-256: ade1df6e30f91a2f5fb6381005d86b447db669555c2cc55f1a82d003ea202c0b
font_01_sfnt_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 10572 bytes
SHA-256: 1fe896037a1e93c8d793b789330ba0f01954c94e6fe0deda3a07e05562e844e3
font_02_sfnt_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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