Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c451fdd226e80a…

MALICIOUS

PDF

68.7 KB Created: 2021-03-24 17:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d58dcb8386e006d90034eb6aaa9b01a5 SHA-1: d1202b9ee51176b03846e0c2ea80d823519d2d2f SHA-256: 94c451fdd226e80abdbc65981fceaade289bb7a90d3726fe29510adffa3e4b48
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains an embedded URL pointing to 'lozipotod.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'free synonyms worksheets for 4th grade', indicating a social engineering tactic.

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://lozipotod.ru/aws?utm_term=free+synonyms+worksheets+for+4th+grade
    • https://cdn-cms.f-static.net/uploads/4420905/normal_60296bf70fe6e.pdf
    • https://cdn.sqhk.co/wakivugex/iagehex/jevapedon.pdf
    • http://pusovemolexed.scienceontheweb.net/60125096307.pdf
    • https://cdn.sqhk.co/nokulebepoba/hjVPpih/zawojojeguxavebibiw.pdf
    • http://rukawagamijo.iblogger.org/online_books_to_read.pdf
    • https://cdn.sqhk.co/sawibevas/ijsBDEu/zalotopotosutexinujavik.pdf
    • https://cdn.sqhk.co/gobajejuz/kjcxgjl/alone_sad_girl_pic_for_dp.pdf
    • https://cdn-cms.f-static.net/uploads/4412761/normal_6016c1b22e77a.pdf
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5feb4f335d282.pdf
    • http://dalidusiz.mywebcommunity.org/visual_data_analysis_techniques.pdf
    • http://sokixatov.mywebcommunity.org/68553828959.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56fb9526-41c7-45e5-8666-a9a47079f512/scansnap_s1500_operators_guide.pdf
    • https://uploads.strikinglycdn.com/files/a13e249b-1680-4bcd-9788-e051dce5fa21/80393920933.pdf
    • http://zigugimevalevek.epizy.com/careless_whisper_tab_guitar.pdf
    • http://luzivamo.epizy.com/ser_bachiller_sierra_2020.pdf
    • http://tijojem.rf.gd/ultimate_spider_man_comics_download.pdf
    • http://zijisulejemam.rf.gd/21642740740.pdf
    • http://lirepotinemos.rf.gd/very_hungry_caterpillar_activities.pdf
    • http://lasusebubev.rf.gd/walubaxinekisijesasiro.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_off0000cf44.bin
beace477d6e6b6dc9b24a99bf685a30503c7e6a21b0ee91722012e60922d40dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF44 5592 bytes
font_01_sfnt_off0000e246.bin
054165b511cd8b2fcf02dc90fed2543687aa726d1eca470079c043d29d8536ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 10172 bytes