Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f95f6943e199fb9…

MALICIOUS

PDF

78.6 KB Created: 2021-02-26 05:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2af047adb9870f23b2e62ea1413d7eb8 SHA-1: 29342572b476a9e1b8bcc9f0068b4a4a5b19c5cc SHA-256: 1f95f6943e199fb9eef30aa16e40180b978c917a61acb24e57908fdf403aba34
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of 'cmd.pdf' and related URLs in the document text suggests an attempt to execute commands or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=what+is+the+difference+between+scrum+master+and+agile+project+manager PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413982/normal_6005fee624e11.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ickjchj/93967057383.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/85363383770.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/when_is_the_new_hunger_games_book_out.pdfIn PDF document text
    • http://manthoughtswebsite.website/17370708836wloxb.pdfIn PDF document text
    • http://reduslimitalia.site/lecture_ready_3_second_edition_answer_keyp00b1.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/how_to_draw_a_dog_realistic_step_by_step_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/egfhdgj/25196484899.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/UhdWZF0/euro_train_simulator_2020_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5ffe04968b637.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/jfmicTO/nojez.pdfIn macro / runtime command snippet
    • http://nosinoski.shop/14594004100nvmgd.pdfIn macro / runtime command snippet
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5ff077e7a455d.pdfIn PDF document text
    • http://steelsho1.club/16577385965zknr2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/nIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://turebaso.epizy.com/8883411075.pdfIn PDF document text
    • http://jomabav.epizy.com/local_area_connection_unidentified_network_windows_10.pdfIn PDF document text
    • http://zilapiwet.epizy.com/bombas_de_engranajes_internos.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/displacing_indigenous_peoples_questions_and_answers.pdfIn PDF document text
    • http://jimotomalugeji.rf.gd/bahubali_movie_hd_mp4.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/how_to_check_wifi_ping_using_cmd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5772 bytes
SHA-256: 6581ada89cb4b008f0bdb74cf3d19f396275b4b9bcd54ba2267bf0a4457b48ec
font_01_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 10424 bytes
SHA-256: 7f9a61c9be011cde957f543905c34898eea0900d22fa9a25658f9f4f1b23548d
font_02_sfnt_off00011da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3