Malicious PDF — malware analysis report

Static analysis result for SHA-256 607ed0e5ff157cdb…

MALICIOUS

PDF

81.5 KB Created: 2021-09-24 10:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 27df914658615cfbf8a0dd8afab05051 SHA-1: f68f1ce85e8c8fb6b61d333fa02b1825a8c716cc SHA-256: 607ed0e5ff157cdb771bb62e0201b96e6ac335e5340eb77032efa22759c4b9b7
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and a heuristic indicating a deceptive download button, suggesting an attempt to trick users into downloading further malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports a malicious intent related to link farming and potential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://huntic.ru/uplcv?utm_term=gta+sa+ppsspp+android PDF link annotation
    • https://ltes2.tw-goods.com/UserFiles/files/lapugodapimuxavidofajozuf.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/dakujovime.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/dalurelezevupida.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/21924509393.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/850e5fd396fe61b44671ab07d494a5ee/93883614662.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/14520457440.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/sojasatetuvuteriwapobolos.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/femiz.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/mifawigobawiwemejivod.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/78595161515.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/91384345808.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/70468172773.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/95608439829.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/wezojowe.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/rolalozusew.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/56866249254.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/67004350200.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/70857801822.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/36259071699.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/63524692508.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/54197894216.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/96582564759.pdfIn PDF document text
    • http://grafitym.kz/files/file/jaregipulapuje.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/mopekefo.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/kiguxurobesovogofamu.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/26117418088.pdfIn PDF document text
    • 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_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 17844 bytes
SHA-256: acaa80a54b72fc8e65fd02c83790f1b2a98b6fdd77f71e3eb32198b7abbbb664
font_01_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 10248 bytes
SHA-256: 3a1616557965552e2e6df98297df3924108eab22af2fdb2b76b9ff4245a4c1dd
font_02_sfnt_off0001202e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1