Malicious PDF — malware analysis report

Static analysis result for SHA-256 159960c08022b7c0…

MALICIOUS

PDF

72.9 KB Created: 2021-01-23 16:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ecbbd68aa2f4c5cd8d45945eb1162a0 SHA-1: d3ebe35a14cbb55fbfe119550671abfb47d7190b SHA-256: 159960c08022b7c00d8d2875eb10036bef6fb4be9ea5afcb2b24a381da218f51
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect to a phishing site. The document body, though heavily obfuscated, contains text related to Excel sheets, suggesting a lure to trick users into opening the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=excel+sheet+all+greyed+out
    • https://cdn.sqhk.co/folamudoj/2CaTier/5368775167.pdf
    • https://cdn-cms.f-static.net/uploads/4371524/normal_600c10c591af0.pdf
    • https://cdn.sqhk.co/kizulajeli/jjhamix/likee_kod_nedir.pdf
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5ff1355b212dd.pdf
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5fd7fa2c49cb6.pdf
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fd5f3ade8dd5.pdf
    • https://cdn.sqhk.co/lisutovudaf/hkhgcg4/lexilutuvarevapusoriler.pdf
    • https://cdn-cms.f-static.net/uploads/4365553/normal_600af3d37e378.pdf
    • https://cdn.sqhk.co/zupodejadofe/iigjjGR/fevukanaxodus.pdf
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5fd1c3eec1cc8.pdf
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5ffb477f33f80.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fd0abfd35e87.pdf
    • https://cdn.sqhk.co/tomubozes/gfjagdg/tulejulafaxukexetab.pdf
    • https://static.s123-cdn-static.com/uploads/4416653/normal_5feed70d83535.pdf
    • https://static.s123-cdn-static.com/uploads/4457572/normal_600084ab58890.pdf
    • https://cdn.sqhk.co/baxijaxazixi/fgjhcgh/jenugefewefogopu.pdf
    • https://cdn.sqhk.co/febowozefu/rggihE5/bravelands_book_5_release_date.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mogedozara/64129521883.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/blotting_sheets_for_oily_hair.pdf
    • https://s3.amazonaws.com/jinabisura/73625756782.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe8.bin
42f608365642c3e4b924d3ada4e94cbb42fe4effdec73c4f783759b1e05f5903
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 5328 bytes
font_01_sfnt_off0000f20c.bin
cc8857c77f000375645161093db7e4a67ad035fd57eef0500f50b0c2e8c44e78
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 10840 bytes