Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c6999a5402aac4…

MALICIOUS

PDF

100.1 KB Created: 2021-08-18 12:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 37f4e4c881d9105df71ddb0b3d720d6d SHA-1: 50b2e44c259ec71bea5127f22e68ae35c3a08330 SHA-256: f2c6999a5402aac437c0a8a0e33851da3f519ccae6ee65db4bf162ccadaaedc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites utilizing the formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16098328bd23d7---30455520123.pdf In PDF document text
    • http://gramercy-grand.ru/files/file/8592376133.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/b39c0178ea832cbde1d3456b0b44e8c5/87959611512.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/50423747305.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160711a2a6535c---toseladoxe.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/39016811012.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e9bed978---woruro.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726d1beb3f6---fiwufexavagesefujokuta.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/45482250613.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/xekugop.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5816d2c0f1---pazufozefogidaninuzinot.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/mufuz.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/42074895551.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/gikanewogixumobuline.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/regenulububofururamako.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ae997f0aa---67950827229.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a445eb22796---51281980763.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/71526105523.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/c78489400128bc000036716263eb7cfb/42936166713.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/5f7dac6739cb3d9c2d2fb46d0947f7c7/tonabaxokefofejuworuvolum.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/93364020805.pdfIn PDF document text
    • http://rinsacars.com/files/others/nuzazudikiduxig.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/qs7g6i0ootfujr4benag26ak25/regotomajigotateradinado.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/batekora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=o+livro+da+mitologia+celta+claudio+crow+quintino+pdfPDF 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_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 19740 bytes
SHA-256: d9662d71ff747d74edf0430e1a1772a311c7adae9fa05a25520d30f699a1e219
font_01_sfnt_off00014d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A4 11216 bytes
SHA-256: 8e70c77731c6b3622aa599da591189f05839c1908a04eb8ac5a119d290425dd7

Open this report in the interactive analyzer, or submit your own file for analysis.