Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47f7c0668e26d82…

MALICIOUS

PDF

70.7 KB Created: 2021-10-01 12:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8fc624a12cc09858b26bfbc2a04937e7 SHA-1: 6d5ba7d7c89fec15baf7d6690fc9638b63e51e9c SHA-256: d47f7c0668e26d82ddf6e02a96847f5d88bd0d8fe022193c0158d77ba58a9c5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on domains associated with link farms or potentially compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://aucordechasse.fr/vosImages/masegazogabujebisetufoded.pdf In PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/78415847870.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/95720168847.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/40f0dd54311b6263124c540d415a9dfc/zujowudekaw.pdfIn PDF document text
    • https://edgecs.com/documents/vutibepozovirolisipegapam.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/litupawalige.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/zupagoluxofoxaw.pdfIn PDF document text
    • https://rrrc.us/userfiles/file/dakowixifisoxelapata.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/63662705316.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/tutebovevulirokazabo.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/614b6ff275e7e.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614d2c0ae40ff---konowobibijepal.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/giwuzanupoza.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/jenafa.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161472cf55b63d---vusomatuv.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/nilulewiw.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/mowuzidokumoxekupadowa.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/34441850465.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rmpqbee1kr79jj1tg53u5vh9p0/57630548017.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/dajesadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=colors+kannada+cinema+live+cricket+matchPDF 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_off0000ae85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC697 17272 bytes
SHA-256: 24b7033bbed7b82743543c85ec5d4245d8e865eb3dee0dcbaa04752156822fe5
font_02_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 10824 bytes
SHA-256: 44798813ce9e91d2ce11b9aeb35370b55b86776f009e4e90ecbe6e36684a65da