Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15108b4f0dd47bd…

MALICIOUS

PDF

72.5 KB Created: 2021-03-14 13:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a8e788ce81b85904a294e3288df93ae SHA-1: 5089d79346be36cfdb913475f552ae03dae774a4 SHA-256: e15108b4f0dd47bd52fb573eeff4137d825f750c3f70984277858492aec4edeb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://botokaw.ru/wix?keyword=box+method+worksheet+pdf', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. No scripts were extracted from this sample.

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://botokaw.ru/wix?keyword=box+method+worksheet+pdf
    • http://lazerepil.site/what_is_the_dewey_decimal_call_number7r2d5.pdf
    • https://cdn-cms.f-static.net/uploads/4366632/normal_600addfa0c061.pdf
    • http://doucheapp.xyz/93560782569218jy.pdf
    • http://lelekelosutov.getenjoyment.net/71645355605.pdf
    • https://cdn-cms.f-static.net/uploads/4412588/normal_60353eff0be82.pdf
    • https://static.s123-cdn-static.com/uploads/4492259/normal_6002f7911f9be.pdf
    • http://suwetobolubujub.getenjoyment.net/64841417266.pdf
    • http://autokenn.com/63212064997wo8eo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/setaxilitozuko/fufijupitepitewa.pdf
    • https://s3.amazonaws.com/fazujo/nukasozifamoj.pdf
    • https://s3.amazonaws.com/kubedukowug/ba_ki_date_sheet_2019_ccsu.pdf
    • https://s3.amazonaws.com/devuxuzejozam/beyond_enemy_lines_2_ps4_test.pdf
    • https://s3.amazonaws.com/levovod/jinokifadonere.pdf
    • https://s3.amazonaws.com/lurutopobi/nhs_gestational_diabetes_nice_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/37562c57-a653-47b7-a595-760eea439b37/70684958450.pdf
    • https://s3.amazonaws.com/lakadutof/blackmail_odia_movie_songs_pagalworld.pdf
    • https://s3.amazonaws.com/tenunud/hyperloop_seminar_report.pdf
    • https://uploads.strikinglycdn.com/files/8d1c09e9-6c2c-4636-88da-2141d1a9913d/samumawoweb.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/akulaku_apk_adalah.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_off0000dd4d.bin
250deab1d27ca104363f140bf72586de8527c4fd8f2e88b8c4c697ead7bdbc43
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5312 bytes
font_01_sfnt_off0000ef51.bin
d3cf641f400c3415825a25d266e4a5f1e5d7536a3c9153d26fad0680be316ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 11024 bytes