Malicious PDF — malware analysis report

Static analysis result for SHA-256 6563e8f8f500ee2e…

MALICIOUS

PDF

77.5 KB Created: 2021-02-28 00:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5660e0e84e35a98151295a40beb41c47 SHA-1: 48ec5012085d03a6713a79dfd503b77b65238185 SHA-256: 6563e8f8f500ee2ee561d405e8ca6ae846d3eac69ec58fd60dc3e1d374a6d5fe
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI that mimics a search result for a book, likely a lure to encourage download. The presence of multiple unknown URLs suggests a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=from+neuron+to+brain+5th+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4465003/normal_603205598692a.pdf
    • http://bachanalytics.com/elizabeth_bennet_character_analysis_essaya8cti.pdf
    • http://capridigi.com/90959753734uu22k.pdf
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fd332a750d11.pdf
    • https://cdn-cms.f-static.net/uploads/4474223/normal_5fd37276a5ec6.pdf
    • http://alexsaf.ru/careem_app_for_iphonel4tit.pdf
    • http://klokisik.space/antonio_gramsci_optimism_of_the_will5h9ro.pdf
    • http://idealslim-italiaoficial.site/76011447329j64t7.pdf
    • http://tryraisins.club/zanixugaguramupopiletuwo7ag16.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebesudanolo/dofefi.pdf
    • https://s3.amazonaws.com/bibejovixapis/processual_archaeology_theory.pdf
    • https://s3.amazonaws.com/lokijuronig/88354258033.pdf
    • https://s3.amazonaws.com/pilazi/ferrari_roma_price_uk.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_off0000f48e.bin
07f4a0cb8497d7f0e5ec4f284302f0d7c362f3c05a2864497d40c2254bb69cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5288 bytes
font_01_sfnt_off00010660.bin
0db57456d28b364040728971e5770a3cacfe9c0625aa34ea7131c4402b2c0f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 10188 bytes

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