Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e82d286e1c2a8c…

MALICIOUS

PDF

75.0 KB Created: 2021-04-06 18:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 22ca9312ee12e147a9a5a467e413a8df SHA-1: 700ca9f291f2926aa3559a2a090f3ea06e94a064 SHA-256: 54e82d286e1c2a8cd3846cd0b7d455c59ad5784840e2ba24f263c4119c7bbb98
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URLs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://lozipotod.ru/aws?utm_term=basic+math+facts+worksheets PDF link annotation
    • https://cdn.sqhk.co/zenekukera/Higjfhg/dark_side_of_the_ring_episodes_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/AGAhdje/braun_beard_trimmer_target.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/t7gec6z/salajuzazujegurab.pdfIn PDF document text
    • http://fruitik.space/467100205459b7q1.pdfIn PDF document text
    • http://nesakud.mypressonline.com/breakthrough_plus_2_download.pdfIn PDF document text
    • https://bulobazopikiju.weebly.com/uploads/1/3/0/7/130776241/db6fc03318ad5.pdfIn PDF document text
    • http://lovechat24.club/sapitimetelegatimev0ia6.pdfIn PDF document text
    • https://nakoginav.weebly.com/uploads/1/3/0/7/130776809/gurasu.pdfIn PDF document text
    • https://gulezawajure.weebly.com/uploads/1/3/1/8/131858287/lixejulipip.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/bivetukin-jovazibir-gemal.pdfIn PDF document text
    • http://my-credit.info/50289258585pqrnk.pdfIn PDF document text
    • http://robinmani.site/copay_bitcoin_wallet_apkn5ps9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawurawefivovo.myartsonline.com/22212966308.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/eusebius_church_history_greek_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2ad08c-96da-469c-aa56-2f7edd43e521/tujipezexokipatosepaxutad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb6226f-a4fd-4856-bfd6-a5db9c22042a/wazenulolisixasexunafog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33c0484-9532-42b8-b7ad-d133e8af339b/pretty_little_liars_season_7_episode_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93349e18-4b79-4720-ad54-0c26ce0afb12/finnegans_wake_restaurant.pdfIn PDF document text
    • http://segurixuzek.myartsonline.com/puwunebi.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_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 5292 bytes
SHA-256: 0243ff3fd67c3ddbf4a5364c5531615bdf0d7d22e1eb53a655891294bdd17c52
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 10920 bytes
SHA-256: 4c17e5dda165ed3f2cfb408dbffd100b1351267deda5c19f5309438d14ce9e56

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