Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f44afcdad897f93…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 14:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9701062e79664c1d6c77ca222abb1d1c SHA-1: b5976424bd99732007dd23140a18ea16ceaf217a SHA-256: 8f44afcdad897f93517eb091e0de8fa76d74e699b7d6167e81fdf15676e1679e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or redirectors, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://philabc.ru/uplcv?utm_term=changer+sa+localisation+android PDF link annotation
    • http://jenistudio.com/upload/FCK/file/kefodajiv.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/99585893889.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/zojel.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/28126195611.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/5866734025.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161314c2717cb3---783810361.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/guterufajejaxa.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/jazoxujitilebogorifol.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/87382533907.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/vusuxakevovunon.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/popedatonisefajes.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/82990668458.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210912_E1E58A5DE9ABA445.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613808ba9604c---luxukozuli.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/44245641461.pdfIn PDF document text
    • https://zhansq.cn/upload/file/28812238757.pdfIn PDF document text
    • http://asja.ua/userfiles/file/41953390157.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/98850626945.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/julekikukixedemaxazova.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/gimilobuzap.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/fibenazibejurofisova.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_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 10680 bytes
SHA-256: 76c51e3cf9b5abe6bfa26ec0fe15f8bbfea1a19ec84315ec4d9ef1123e845915
font_01_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 17748 bytes
SHA-256: 266cbef40add3cbfe794825be9ffe821497e4667cb48b75aa0977f0ba28a0cb1
font_02_sfnt_off00011874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.