Malicious PDF — malware analysis report

Static analysis result for SHA-256 173adcbee7a2d0b0…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 10:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bdf2bdec4b409c251b046f9bb78cd7ca SHA-1: 70c3e05b993adce26b39494e1b648c81ed91ca6d SHA-256: 173adcbee7a2d0b033a5f340f2ca515310f0887dd22709a1cfb30761b0f9c3f4
186 Risk Score

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
  • 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://leonvi.ru/wix?keyword=modern+chemistry+chapter+11+test+answer+key PDF link annotation
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/4c051.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/jhageaa/high_school_escape_2_walkthrough.pdfIn PDF document text
    • https://dupomosukafe.weebly.com/uploads/1/3/5/3/135387566/safasivaxorajalu.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/u4iiv79/classic_arcade_games_online_free_no_download.pdfIn PDF document text
    • https://jigukijovumide.weebly.com/uploads/1/3/0/7/130740363/7033988.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/25dimhE/pidugewegezifemetepi.pdfIn PDF document text
    • https://cdn.sqhk.co/wusosekame/5iijfOj/tijowenetowukowelasu.pdfIn PDF document text
    • http://tevfikyuce.xyz/south_african_national_antiretroviral_treatment_guidelinesws1fk.pdfIn PDF document text
    • http://golden-bridge.pro/sniper_shooter_3d_free_offline_3d_shooting_game33nmb.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/c67fcc5ec01de44.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/muvevanepen/29782363086.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/tewenedirebusizelexezu.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_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 5596 bytes
SHA-256: 94b6b2e5c0e08e76db30d2fd0202ea25cf30ff8e18f1d10a5c8fcf1e1100d37f
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 9756 bytes
SHA-256: 596a1962cffa175945e66550690e7d8e070187b3cfbc67b51e602ba1099ee364

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