Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d456eaa3ce08e32…

MALICIOUS

PDF

83.3 KB Created: 2021-09-12 21:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd4ef0c78b0c1f17d545ec55c1a9e98b SHA-1: c2ac0879cd292d88b44a47ed5eb9bd191525bc13 SHA-256: 7d456eaa3ce08e329b2895d28ecf7907be4d0e2aaf08ab6bd079a13df430419b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, identified by the PDF_JS heuristic, which likely redirects the user to external URLs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of external links hosted on disposable domains, suggesting a link farm designed to distribute further malicious content or phish for information. The ML_NYX_PDF_MALICIOUS and ClamAV detections strongly indicate malicious intent.

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://catamma.ru/uplcv?utm_term=pc+suite+download+for+windows+10 PDF link annotation
    • http://prompol.com/media/file/9854849110.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630632495.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/xisoxodofez.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/vimuxadamumimod.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/kodubok.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/pemewolalojape.pdfIn PDF document text
    • http://orthodoxnews.us/file/lixaxemurakeboge.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/zirelel.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/zozotesilid.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109101150201897.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/78843614292.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/87234375149.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/zupuporenutowedisa.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/47874171001.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b80880965e---62833030982.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/61389398732.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/jiberurekeja.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/60345338323.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/tupofiwalu.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/45996904854.pdfIn PDF document text
    • http://stl-hk.net/userfiles/zulakoneg.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/44101349473.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_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 17860 bytes
SHA-256: c65b3c08d3602dcff68533c95903eea8a3b6dc4fdcbf3f849ab86b5538a4f285
font_01_sfnt_off00010e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 10828 bytes
SHA-256: dcb6c21c4d59d4e114f362347cbf077c737a8f8df737b689a73853c739d9bf1e
font_02_sfnt_off00012775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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