Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0b794f41ede35c…

MALICIOUS

PDF

84.5 KB Created: 2021-09-23 03:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9f65e0f40951e8e9b4903251d2087f08 SHA-1: a897e488aca3ada6028b5c0d2a7d545435254571 SHA-256: dd0b794f41ede35c71367d02bcd5412bcaf0351454212f20edbdb9c3b063b2af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://coretry.ru/uplcv?utm_term=outlook+kontakte+auf+android+handy+importieren PDF link annotation
    • http://kstarsmall.net/userfiles/file///26460176698.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/gomexil.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdd92d2019---14214582.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/zusizutaxupew.pdfIn PDF document text
    • http://cmtsport.com/pliki/22461440598.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/20569703070.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/v1bdcksa7h27nu8peuhb7b3qol/51302014520.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/72087350039.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/12420801372.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/53336894239.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210912212230_1165422255.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/6361125655.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139232bc7475---24822954116.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/fukozezuwigagasezedibava.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/lanobenudofovisamovimalu.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/kularolekad.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/ralitegoxugit.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/52181616393.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/lokaxisezireximo.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/1523f100343c85345b06fc3d454d8979/lexezomutewaletedi.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/tatigetimon.pdfIn PDF document text
    • http://clingac.com/d/files/82674801451.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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 19016 bytes
SHA-256: 0068ceefe799f1c7790cc6b5016d6bbefb8e2bad6809c726bfc1c795cbb9a6ce
font_01_sfnt_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001294f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294F 10924 bytes
SHA-256: 7bd26d3ca5bd46ac15b2e31a3a91ea0661f024c9687438e7383c78a2a0ad547e