Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d564d2eba49458a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 11:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d4a20c88f50e18ba8392970f068bf2c3 SHA-1: 11205dc0625e87b4db689f137ca76d31bff340b9 SHA-256: 7d564d2eba49458a5a9d699a459543ab283d93b15bcbf32b2d094fbe7a72dd40
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external files hosted on various domains, indicating a link farm designed to obscure the true malicious destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://beastyenergy.com/userfiles/file/xikasanudaja.pdf In PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613271f51c020---mabafunadunelem.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/jadoxikotewajaroleliki.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/kagoxexifinopexivefim.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/nemovanudegevu.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/busiruzibozo.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/vadomowitumotin.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/voras.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/50830185131.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/10546730788.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/36585863759.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/zafeligotuxufexepelu.pdfIn PDF document text
    • https://terracell.info/images/file/zefimiximumegebovotizu.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/21086901363.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/29600323655.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/gukipa.pdfIn PDF document text
    • https://taperagi.com/contents/files/siwipe.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/33671114638.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/76376426856.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/67607486199.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/89255878366.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/99136439577.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/nemegobosudimekoraw.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/62297331402.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/pepelunedozajitonawozeno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=iptv+smarters+pro+firestick+4kPDF 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_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 17688 bytes
SHA-256: 1f718238ed4fb9acfaa11c3a88a5550e7a9ee32c2b5b79a3c51f33eb0bb7e909
font_01_sfnt_off00010530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 10676 bytes
SHA-256: fff697519a76b9f4d41e7098192a57c0b3b71ecc32f3cf449bc56d6ee111522f