Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad71f4a4e46837b9…

MALICIOUS

PDF

70.1 KB Created: 2021-03-31 11:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1c57fb43334c3f7b92e73ce8ce16bdf7 SHA-1: d4dc9875192856b4be46a889b8b60f017cc26ae8 SHA-256: ad71f4a4e46837b93d2f0e74b9ae09cade11e4d7858b6b4226c90d25692c37f9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains an embedded URL that leads to a phishing lure. Notably, the document employs a 'Clipboard command execution lure' heuristic, instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/strik?utm_term=french+english+dictionary+free+download+for+pc PDF link annotation
    • http://kujotisokuvo.iblogger.org/bolt_standard_table.pdfIn PDF document text
    • http://raliwoze.iblogger.org/handbook_of_local_anesthesia.pdfIn PDF document text
    • http://lodubesemo.iblogger.org/8968803082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejexe/wutixupujavokejemuwoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/icse_specimen_paper_2019_physics_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/android_studio_2._3._3_32_bit.pdfIn PDF document text
    • http://fixadamobus.epizy.com/what_is_the_main_idea_in_each_stanza_of_the_road_not_taken.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/candide_voltaire_free.pdfIn PDF document text
    • http://fivulesesixiji.epizy.com/bmth_wallpaper_android_hd.pdfIn PDF document text
    • http://getuweloniwa.rf.gd/rosotobokaxubira.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/supefuwenut.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/tokis.pdfIn PDF document text
    • http://kisuvixoj.epizy.com/wumakolazu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/sigomegulupegorefaja.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/71858462847.pdfIn PDF document text
    • http://bupizaxumora.epizy.com/elementary_biology_textbook.pdfIn PDF document text
    • http://kafuxuf.epizy.com/can_keurig_2.0_use_reusable_cups.pdfIn PDF document text
    • http://lojosikol.epizy.com/8663246737.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_off0000d16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16D 5568 bytes
SHA-256: eeb0ed38db46ddea162471428b25de6b54cac1b457f387d09ffd32fb3b712a41
font_01_sfnt_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 11368 bytes
SHA-256: b6e5db75d8eb13029720e1119bd28919f0e38f34d8c1728992604c57a24ccb49

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