Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6668dcb52d984c…

MALICIOUS

PDF

71.7 KB Created: 2021-09-18 09:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4fae87e260b14bb92f8343a46f172a95 SHA-1: a424d798ff89c8f5f6ab1d2a334e8eb660a02095 SHA-256: ba6668dcb52d984c01713b28b9a4d6e82d13ec773d403f14038f69d0fc809219
134 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing operation. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://metrominicabs.com/survey/userfiles/files/dawenenanogupolo.pdf In PDF document text
    • http://st-ark.it/userfiles/files/tuwuk.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/25027623809.pdfIn PDF document text
    • http://coumert.com/images/file/vonofoboxojejinezudox.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/xixidawirapa.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/28875397629.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/kegisefabezemuvifoj.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/61862411521.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/zizatesaxigiditafan.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1630623819.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/dujokofafobimotunejar.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/sexeken.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/sedotixebaden.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/bawewax.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbd0a892ef---jaxinesesi.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/91368548354.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/26548011022.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/zenatab.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/kademi.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/dawivadoxidox.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/talup.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/40858419034.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/30786380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=wcc2+game+download+apk+for+pcPDF 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_off0000b60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 10896 bytes
SHA-256: d3edb5500f961865a77dbbb8aba3847159f3d98ecf8da06c1f9ac43da5c243f7
font_02_sfnt_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 16448 bytes
SHA-256: be4ea32fd85cfa63d4ae0a8187fef72d8f7701cb6ff8ce3ab7038ffaa03d502a

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