Malicious PDF — malware analysis report

Static analysis result for SHA-256 7140055196154efa…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 11:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6df81cd53c71a9909e13981cd29b89bf SHA-1: 969810e92df2a85f9c1b13ddda3d7de79c1cda82 SHA-256: 7140055196154efad4019a753b9501141f8978eab31a0dc321a2cb4538d32415
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=angles+and+triangles+worksheet+4th+grade PDF link annotation
    • https://cdn.sqhk.co/xerejijasoma/fmijajc/vojuxedovetov.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/muwubinifoxenod.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/2006_sea_doo_speedster_200_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/emgcfgi/idle_hotel_tycoon.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/nofurugipekepo.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/louise_hays_park_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fe12b735c61e.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/egiRghF/huey_lewis_power_of_love_karaoke.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/intelligent_control_systems_an_introduction_with_examples.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/how_to_convert_n_mm2_to_n_m2.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/3930145035.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/29359129626.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/oracle_sql_developer_data_modeler_for_database_design_mastery.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/42908566582.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/22180280868.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/1969_ford_mustang_mach_1_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/mhw_longsword_advanced_guide.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/3480656144.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cyberflix_tv_firestick.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_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 5320 bytes
SHA-256: f14c8ffb30c57631b38f2e358d7bd27609e498612ec5a4284dc602deb952203d
font_01_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 10628 bytes
SHA-256: 1e4b21b57ed32d8499b4e9c59baf8eda13aee854e3fd926f185eef842ae4edba