Malicious PDF — malware analysis report

Static analysis result for SHA-256 d007c0c5266ff52e…

MALICIOUS

PDF

72.3 KB Created: 2021-02-12 17:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c65757e6e911e9647f05df61d08d44c9 SHA-1: c6c1f0dfaa077d26497c19af91be1955c873b3fb SHA-256: d007c0c5266ff52e1a3afad649955bee4f6c659978cbb516673617f32a6549ed
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URL pointing to 'jottigo.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The ML classifier also strongly indicated maliciousness, supporting the phishing and trojan classification.

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://jottigo.ru/123?utm_term=vis+wax+machine PDF link annotation
    • http://jizefuli.22web.org/vasusepuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_60223d2884087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5fc9157ca99bc.pdfIn PDF document text
    • http://nunegotopexipo.iblogger.org/google_calendar_5._0_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384048/normal_5ff54d9c52e65.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/tebebutobanos_sukizud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5fddd0fec96d8.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/49235456306.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/jusabuzuwax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5ffcc7c538c1d.pdfIn PDF document text
    • http://sanadewa.iblogger.org/13439137586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_600e9fdb100b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fe908bb74de7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xorosobodudirug.rf.gd/compound_interest_calculator_daily_spreadsheet.pdfIn PDF document text
    • http://ribebipewafiwas.epizy.com/jafukerevetataxikazida.pdfIn PDF document text
    • http://bunokupisosep.epizy.com/undertale_theme_flute_sheet_music.pdfIn PDF document text
    • http://residarifuwus.rf.gd/xidepezutadulexifi.pdfIn PDF document text
    • http://lafeseg.rf.gd/dengue_guideline_sri_lanka.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 5036 bytes
SHA-256: 487be84706be59aba4d7b5d7533d13a5018166a4eeab268ab60a1721d7129510
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 10472 bytes
SHA-256: 7d2e093bb5ba7a0db174344b0662a9dcd48a5a118142211dea96ff67c64fdd4f

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