Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d18e73a64fdabc2…

MALICIOUS

PDF

83.1 KB Created: 2021-09-08 21:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e0871ab16b4ab2c3d58566d226eae556 SHA-1: c693c35601fc9dcfbb57b88222ce11b6e46cecc8 SHA-256: 2d18e73a64fdabc239da3f9788b02b3348758de696c618cd2a1821113ce584b7
126 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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan implies a malicious intent to compromise users through external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://corse.annuaire-regional.com/ckfinder/userfiles/files/fulapokizegazax.pdf In PDF document text
    • http://godsownproperties.com/userfiles/file/zeved.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/71495440215.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/78171657288.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/mevabofejofegokefesoga.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/rokawupelepe.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/mojivedugimemibesamaruto.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/20219554587878.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/pimuvejigavabofa.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/darol.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/gopaliz.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ead83ba9c5---votofoze.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/4944180590.pdfIn PDF document text
    • http://synergyproperty.com/images/files/64158578848.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/9531687086.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/fepimopelij.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/xavuvujiwufitilixaf.pdfIn PDF document text
    • http://naso10.com/userData/board/file/51017222629.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/22898925089.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/wudebojubojebiwave.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/rabonofipumuleve.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/20246921886.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/40757276108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=trip+planner+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_off0000e3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E7 17188 bytes
SHA-256: d6c54c931a185d7193020983a353b334a040080925df17588c4483bded5f83d4
font_01_sfnt_off0001108f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108F 10084 bytes
SHA-256: 3485558e7d12714ef99dc868a4a1f9d72ffcf61c0abf5b5af5ce05391f3a836e
font_02_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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