Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c1e75f97a54856…

MALICIOUS

PDF

204.4 KB Created: 2021-07-19 12:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0eeb421a8c663bc0e359cc7f5225285f SHA-1: a42b19993f2c791a55b7edb6d01652683f71a034 SHA-256: 60c1e75f97a548561db022d74364237d50590afef4cd1d529a9ba5b4950154c8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains multiple links, several of which point to compromised WordPress sites, 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 redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c936afc5686---79877884978.pdf In PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/u281i6uceg7qf7s7nqrb94hdrq/ximewotasapike.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/628833452.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcc9a07c17---kuwakukovanuzukodimalipux.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/lirubasujuradazanumosatob.pdfIn PDF document text
    • https://irrisyst.eu/files/file/28652241364.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b73ba9897ee---bixuxesibe.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zoxomoge.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/52211406572.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/nesikudowiwotipu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b666aebbcfa---68859542476.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/9541319569.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/70557960992.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/6662735848.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1da0185c---fosada.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/0763f8f6ed248804b41d7200a7460748/gegevakasegogivananifagu.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55da8337c---41911939373.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f02b8776---90955823652.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/wajali.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/bomobivosizukevewimewari.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f105f3e9ea7---naligono.pdfIn PDF document text
    • https://agatanorek.com/files/file/39130131609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=vita+life+in+a+zone+of+social+abandonment+summaryPDF 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_off0002c1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1B5 18632 bytes
SHA-256: d6c18e3a791fa01af35473c452dd3f889cb77aea6fee589fd111b1181dc20501
font_01_sfnt_off0002f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15D 11020 bytes
SHA-256: 5975679b8dbe4f04a2bf0a1fd01b0f2caa282e06a064149a7f635d4b3d4148c0
font_02_sfnt_off00030b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1