Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b46b2b264fe6fc…

MALICIOUS

PDF

75.1 KB Created: 2021-09-10 00:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e6fea63f91d6e7e323a99db9127e3d3 SHA-1: 4a7da03fdd7529059b0498f2f1fa9b8de6c0a9dc SHA-256: 98b46b2b264fe6fc3922d76c3af58327c118688cdc88b46d74e8f544855f39a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, including one that appears to be a redirector with a UTM term, suggesting a phishing or malware distribution lure. The PDF structure and embedded links indicate it's designed to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://synerhu.ru/uplcv?utm_term=flight+radar+24+mod+apk PDF link annotation
    • http://yoshitomo-kokubunji.com/jcfiles/file/pubiritalesetamagaliw.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/89880570999.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/38329405444.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/73158970237.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/49905102399.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/kafimekisududimasidifa.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/92548090350.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/e0de00e666ce1d4384723f1e37cc29a2/manetid.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/60788484977.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/39168318498.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/kegomagowigifadigefuliv.pdfIn PDF document text
    • http://15881588.com/ckupload/files/tajotarifogepasagazigukas.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210908183257.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/vumedilumivamofuwo.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/60522756106.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/385d1ae3f0de45d745903516c1f069b8/67675012756.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/gukotuzijarikolaw.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/26901658801.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/71020122101.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/80948227085.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/xetalaruwozalevagamekube.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/namirebomavomitixera.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/zalukabupejer.pdfIn PDF document text
    • http://medi-sen.com/files/files/68816476073.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/xigejarakaxofaligo.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/19770128980.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_off0000c5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C5 10700 bytes
SHA-256: 57ea69514e4ca2b680680d68c80c9ab5ddd5b331d364a9590c104b060c49e504
font_01_sfnt_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 15964 bytes
SHA-256: bc492d9bfd5d878176c3b444aa409eba030e41c6d8e4411202f39178d131e119
font_02_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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