Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f60ffb6b03180f…

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 03:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a2e26cda490ad751d6f0a9c772540dbd SHA-1: b68084faa7289f0c38f5a4e0864aa3a9b6402ceb SHA-256: 00f60ffb6b03180f273d6e7f37c03fd959b4084d56217a6f9266e98b1f9ca062
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many pointing to disposable domains and forming a link farm, suggests a phishing or malware distribution scheme. The file's structure and numerous embedded links are consistent with attempts to lure users to external sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://turnwealthy.com/ckfinder/userfiles/files/xaxomanosonuverew.pdf In PDF document text
    • http://herve-coiffure.ci/files/wumesoxuxufedivawob.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/xezotidoleragor.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/dirapagilipofupas.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a082e6f3ed47bdb0123c737e6d279136/86329533292.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/vamizexezonigegewomija.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/gofajonajovutof.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/pamipajap.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/51627027322.pdfIn PDF document text
    • https://promise-land.com/upload/file/fotilijowikumopufefo.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/javetekerokuf.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161393c6b9a6c5---46622003150.pdfIn PDF document text
    • http://shesob.com/file/files/58172201661.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/woxakifoxelajoz.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/7180643840.pdfIn PDF document text
    • http://makaroma.fr/upload/file/kanikesav.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/35225545561.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/56374847006.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/7479866507.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/ladonezudilemufijedebuda.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/24885318852.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/1628057404.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/2232366243.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/33490012984.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/jowaketovira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=diskdigger+pro+file+recovery+apk+2020PDF 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_off0000d7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D2 17180 bytes
SHA-256: 6d94112cd989a1763b6c599b1500e36403406f0e5cc54a240ccc9bc2b67db4a6
font_01_sfnt_off00010451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10451 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C68 11108 bytes
SHA-256: 57711635cf0df6aec55f025f7a0301649b7686c7aebee3cd2711c85a8eab81b9