Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba7a1fb472a58e2…

MALICIOUS

PDF

67.9 KB Created: 2021-09-27 05:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c9c7dac248fc2d9b637b0249536f494f SHA-1: f1184702e21ae70dac20238642392d6242b5d68f SHA-256: eba7a1fb472a58e24b4ea5d0910b7e12f6e295d7dc0474140ee6e47217bef78a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://daindnc.com/fckeditor/userfiles/file/6120870097.pdf In PDF document text
    • https://theurbanthinktank.com/files/bikunofaliliriwe.pdfIn PDF document text
    • https://tpk-m.ru/files/file/39138576921.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/saruwato.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/14799489472.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/86852225625.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/75327082246.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ab1212e7c91ff9745aa1e382a2c3e843/69432470130.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/ninopesixuruxodesowu.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/gefozasa.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/88298227608.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/fepela.pdfIn PDF document text
    • http://grafittipng.com/userfiles/files/74774234089.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/wofebolifiw.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/kumudalibutamunewimijot.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c6a606dba6---42056237410.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/56838063818.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/doxizawebidewefatorin.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/wujudogero.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/18596123631.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/bofidaradeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sharingan+icon+pack+for+androidPDF 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_off0000abcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E2 10620 bytes
SHA-256: 5d07bccd66cfb9548cbdab7df8d7dac4bd6dd4a9d086e82f95885090a0a2f1a2
font_02_sfnt_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 15072 bytes
SHA-256: 8eda2029e4fe46386ee1a20a7fb18bf3d3ed5f0828b10deea49badc5841183d6

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