Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac628be18f7e2018…

MALICIOUS

PDF

76.1 KB Created: 2021-02-13 19:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 106dd60d767c92f7a43282052e2162d9 SHA-1: 143e0f400489cced3abfccb4649b7f1661d964d4 SHA-256: ac628be18f7e201881c6f0ed3a99cf6a5ae0f00473b332f599f31a463c830b7e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/123?utm_term=naruto+shippuden+episode+415 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fde4d25d3237.pdfIn PDF document text
    • http://antonioit.fun/brute_force_affine_cipher_python13f87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414341/normal_5ffa7c52eb90d.pdfIn PDF document text
    • http://gulibej.22web.org/vezidupubex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_6024fb6cdb877.pdfIn PDF document text
    • http://vitedotom.iblogger.org/71008965807.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/sony_android_tv_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_5fd9815761eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fd2d30d731dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/75646589644.pdfIn PDF document text
    • http://gegapitigiz.rf.gd/31206631779.pdfIn PDF document text
    • http://voxotili.epizy.com/wedatewolazavo.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/auto_browser_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/adobe_photoshop_fix_latest_apk.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 5248 bytes
SHA-256: f516ce6c4ab1787a69b51ec0666dba7ac0dafe3fa0e197aafff58f22755126f4
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 10840 bytes
SHA-256: ef4a6960051c580bc908163880c5760efcf61772c4ac3b528f08761e11756790

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