Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bc2b791b41d1b6…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 06:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2427796aa454772a9e4ce9c4020d6b02 SHA-1: bc8b8e37a19f30625694268992b8db8f66cff77a SHA-256: 20bc2b791b41d1b63d5abef3b34cb916b2628930552b35bf946af635a3b24c07
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=world+rally+racing+android PDF link annotation
    • http://semihkerpiccilervesupersound.com/upload/file/zuxapebafumi.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/tojisege.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/poxifijakevuv.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/tiribitodiforo.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/riwesixasonobodevevejo.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/bisomarawalumosolu.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/46323589345.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3eae4b198---89842105847.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/82860671318.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/33314024304.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/newakesozijodufufufezepo.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109120518173600.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/sinewaxewimosomeme.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/79553801213.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/37200346419.pdfIn PDF document text
    • http://kco.su/userfiles/file/60325197887.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/65180149573.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/68631113774.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/suzebawufopafaxowa.pdfIn PDF document text
    • http://hak-al.com/resimler/files/73595421989.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/sisometur.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/wifalopafi.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 17016 bytes
SHA-256: 53c9cfabbd0af004a3a4c9acd0ad27d79966181e3046ca294360aa1b43cb52f6
font_01_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 10252 bytes
SHA-256: 47008822eb7d24977312f42f305b1de7270ccd2c0e9baf860cd27f6ee82ebfc6
font_02_sfnt_off00012834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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