Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f5371822f25865…

MALICIOUS

PDF

90.0 KB Created: 2021-03-24 23:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a142b3e808b09dbf16794e090766cc0 SHA-1: 2baf7875c5e7503ecc0cc317a0db8aca9553d095 SHA-256: d4f5371822f25865f8e5778243802fe975ecaadc39a4867ded67cf1c03bc370c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect the user to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=what+is+the+role+of+a+security+guard
    • https://cdn.sqhk.co/navuwamas/Fehfeie/cool_font_for_instagram_apk_mod.pdf
    • https://cdn.sqhk.co/naboxolat/b3hdidX/15146985138.pdf
    • https://cdn.sqhk.co/tixelila/kJOg2jb/92692239195.pdf
    • https://cdn.sqhk.co/bililusele/hXrlwii/cabal_online_para_android.pdf
    • http://123dutch.com/sitivimuzutulu46dii.pdf
    • http://procripton.com/zufutototixajowizuboxijamsby9d.pdf
    • https://cdn.sqhk.co/tenokesime/j7ifCw5/sevati.pdf
    • https://cdn.sqhk.co/rufopunuk/jaI6hcE/57222466956.pdf
    • https://cdn.sqhk.co/wafavalufa/iiItbVM/okra_project_location.pdf
    • https://cdn.sqhk.co/dedogupazib/ZiVj9jc/assamese_all_bihu_video_song.pdf
    • https://cdn.sqhk.co/tewokozogop/9gjnwrm/pubg_name_font_generator_with_symbols.pdf
    • https://cdn.sqhk.co/gumakulex/nhfHDkQ/82538513633.pdf
    • https://cdn.sqhk.co/pibexezases/geXueia/i_m_learning_a_little_spanish_in_spanish.pdf
    • https://cdn.sqhk.co/vonirosidejo/bPgcFgg/56817330657.pdf
    • https://cdn.sqhk.co/raserijene/iiFhuwU/bokatasimukof.pdf
    • https://cdn.sqhk.co/wibononuve/erBjphg/line_color_matlab_rgb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wukara/bbc_brexit_live_reporting.pdf
    • https://s3.amazonaws.com/fuvidokibet/what_are_some_human_conditions.pdf
    • http://juvegebufu.epizy.com/197454155.pdf
    • http://gunexukod.epizy.com/digital_integrated_circuits_google_books.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011613.bin
d04e466009770599abb7386d5468df8c4f770971f4dceb3b4866c60c2ec4ea22
pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 5176 bytes
font_01_sfnt_off000127d7.bin
a1b8597e0fa50ed763f01b3dfb24966e575f28887c89fef563d220bfdc0ef9bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D7 10924 bytes
font_02_sfnt_off00014cb1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB1 4324 bytes