Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0194c1dbb7b6269…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 00:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6eb44328b08eee1c99ac22ba33e3274f SHA-1: 84a05c683793e44b75ae8cef1f1da63ad5f001d6 SHA-256: a0194c1dbb7b62696e354c62577da040f56e8829d8f7cbdae55072b8d52d08f6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://canadanur.com/resimler/files/bixavuvobevepa.pdf In PDF document text
    • http://reklamavysocina.cz/UserFiles/File/pefupob.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/rezog.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c66eeabe9---27083368441.pdfIn PDF document text
    • https://eclearusa.com/images/file/nanawezasifasa.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/bovewiradesa.pdfIn PDF document text
    • https://n-tlg.com/files/file/jukomol.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/zosil.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/zikateg.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/vudojasozalalonajedumi.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/gugigejebanogiw.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/kkd424gjgmudhpb69omo588a4s/64938653755.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/1451016109.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/90023493330.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/titevixojuxiwevokuw.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/vujuni.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/20007828788.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/77505154048.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/jipovozek.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109111135569628.pdfIn PDF document text
    • http://koddous.com/userfiles/file/38220406704.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/72153180152.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/dubijajov.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/zevilojobefemivuponuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=wrong+turn+5+full+movie+watch+online+free+123moviesPDF 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_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 17780 bytes
SHA-256: 92a52fc50fceb5a0e10bf2e9a45bc8a7e0f554d397e4c4848a60358dfd1bc80e
font_01_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 11508 bytes
SHA-256: 462e73a2955495454731cf725762a38ab29f10258709797f44493c4087dae103