Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc7e590c6af8c23…

MALICIOUS

PDF

77.9 KB Created: 2021-02-18 14:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d48476b235a0135791453d056f7a9b1 SHA-1: 9d33ac8c76905e9c65af291b272313b1b0041fd4 SHA-256: 4fc7e590c6af8c23d63b26b8d79caa5221bde1b0229ab0ae1caa5d04fe89d904
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 0.9996

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://maypoin.ru/wix?keyword=medical+language+immerse+yourself+pdf PDF link annotation
    • http://winoorama.space/lajojengtdl6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_6005aefe17e97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5ff2790f4aa03.pdfIn PDF document text
    • http://natorg.fun/4063612828198hqh.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/a1jaggK/bomber_jacket_with_hoodie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fdac2c653f14.pdfIn PDF document text
    • http://topuniversityru.fun/40359323587vrjzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_60273af6ed70d.pdfIn PDF document text
    • http://13millions-warzone.store/379578395179vxnm.pdfIn PDF document text
    • http://podarokinsta.online/82596809919i11gk.pdfIn PDF document text
    • http://prodit.space/21321021529rwys0.pdfIn PDF document text
    • http://bandalet.club/indoor_air_quality_monitoring_reporti5d2f.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/bdt8bgj/fapamezogegarolaguzupi.pdfIn PDF document text
    • http://swiss-gear-top.xyz/official_taekwondo_training_manualztejd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_600493d69d8dc.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/hgjahaL/chest_tracker_for_cr.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/nitawoz.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000dbeb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDBEB 9516 bytes
SHA-256: 3d87ac55991058e76260965efa2703ae54777e447462fc2c01fd673f2f70a8a8
font_00_sfnt_off0000c9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BE 5384 bytes
SHA-256: 6de54942929dd3fd1e013b026e90e7a688a810cb507a0ff230fc5e8e4f332a22
font_02_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 11152 bytes
SHA-256: e6959cfc5e231739f8215de97753dddb6528d733d726e7c797377a8dfd6eafd8
font_03_sfnt_off00011c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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