Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53d4f47ca3e5ef1…

MALICIOUS

PDF

64.5 KB Created: 2021-02-06 17:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 39b566a68623239d06ac3f0bcc90928c SHA-1: 02925abbe32321e513ff025bde6da09a0874216c SHA-256: a53d4f47ca3e5ef177d58c97986f4a7ba929a5645bbeb569175696a97725b279
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=angamaly%20diaries%20full%20movie%20free%20%20hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fde0716e4e08.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/xumajovi.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/LEhgiaF/brain_training_games_for_elderly.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/nevevitona_kitawofasuvom_lowojilexefiva.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/jeHjd0X/11991803899.pdfIn PDF document text
    • https://niloberu.weebly.com/uploads/1/3/0/7/130739427/6138503.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/Fibc5jb/american_football_nfl_live_streaming_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_600c01d8a94f3.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/uQghgft/what_s_your_story_meaning.pdfIn PDF document text
    • http://borutafag.66ghz.com/lowman_weather_report.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/dugibabafod/sikanepowevimimeto.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/safety_and_reliability._theory_and_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/weather_report_for_columbus_ohio_tomorrow.pdfIn PDF document text
    • http://bajipodi.epizy.com/genetics_practice_problems_worksheet.pdfIn PDF document text
    • http://beperedusewigu.epizy.com/food_inventory_sheet_example.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_off0000bc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7F 5472 bytes
SHA-256: d39a3f039b48d3ab251d17e60f6c0c4859d87f7435cba398e18e28079ff775e9
font_01_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 11548 bytes
SHA-256: bbb8b8afc7824964fe8378aaeb7461ed6f22af5952f5dcbf7672e961a461471b

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