Malicious PDF — malware analysis report

Static analysis result for SHA-256 4763b4158faab2be…

MALICIOUS

PDF

85.5 KB Created: 2021-02-15 14:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b0179101b7843bd17e7e0e0123dc01a SHA-1: de29d7aa008c792e3f23af816cb6d7465778389c SHA-256: 4763b4158faab2bea2f2ff1d519a5cf6c67ca9e43e3c20f4eb2d39bd7d1f8acb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This URL is presented in a context that mimics product reviews, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=kobalt+60-gallon+two+stage+electric+vertical+air+compressor+reviews In PDF document text
    • https://cdn.sqhk.co/sawibevas/yifjige/kibamiwowinogesosufoge.pdfIn PDF document text
    • http://omerkatanalp.com/important_items_on_balance_sheetd5uit.pdfIn PDF document text
    • http://azules.ru/encontrar_mi_android_con_el_imei7pafp.pdfIn PDF document text
    • http://potolkilife.ru/138638448491pjr8.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/eOhcgeH/problem_exploration_methods.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/pdf_bestand_beveiligd_tegen_afdrukken.pdfIn PDF document text
    • http://fitokapss.xyz/warafejudilobetiwufep1rcq3.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/3496688.pdfIn PDF document text
    • http://kemytbok.xyz/lepirujepuxixmxkly.pdfIn PDF document text
    • http://metalllift.ru/sojimidvvgyb.pdfIn PDF document text
    • https://cdn.sqhk.co/tubivuvopitu/ptgfdig/gewewufewekup.pdfIn PDF document text
    • http://reduslim-officialsite.site/505811968855v2j.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/C6w4lgi/news_about_kobe_bryant_s_wife.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/bidemewufa/wikotavufod.pdfIn PDF document text
    • http://sunuwib.epizy.com/autodesk_uninstall_tool_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/44005853906.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/91274672713.pdfIn PDF document text
    • http://zikepodaw.epizy.com/aaja_nachle_songs_musicbadshah.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/doyles_guide_family_law_gold_coast.pdfIn PDF document text
    • http://levowemorunob.epizy.com/software_architect_resume_samples.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_off00010e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 5844 bytes
SHA-256: 4bd6f4910dd192b9d2ec5ffe1769e7bf7e8d87dffbb5a9dddb095e20dcc372e2
font_01_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 10944 bytes
SHA-256: a66702cefbcfebf7e7d1c7847c7c51a5c0b920bdc703cbb30a05afed267fcf02

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