Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d8bfa370ff7de8…

MALICIOUS

PDF

74.7 KB Created: 2021-03-30 23:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c29e724874f356c46f0ab977d70522b SHA-1: 1154d4f38771522a85cce92b5db1278b0fd73bb6 SHA-256: f0d8bfa370ff7de8bb9582ace0e1b36aa11afa64e87dcd80ca825c5b7b32fb50
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/123?utm_term=gcf+and+lcm+problems+worksheet PDF link annotation
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/ranumomidadubizu.pdfIn PDF document text
    • https://tiralilibixadu.weebly.com/uploads/1/3/4/5/134500138/43d573c8171f.pdfIn PDF document text
    • https://jerusofiv.weebly.com/uploads/1/3/0/9/130969981/1080072.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/bostadsbidrag_blankett.pdfIn PDF document text
    • https://bimuwalunamen.weebly.com/uploads/1/3/1/3/131384226/medorezaro_dinakaw_rakosisawotuwu.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/getodovasijopudututirami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6b4ae791-142b-4756-bfa9-8d18d9acc7de/is_there_going_to_be_a_season_two_of_nancy_drew.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/what_is_meant_by_a_pure_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/ace_study_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/dubitejerinilanogavix.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/inteligencia_emocional_teste_online.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_296378e0eabc4f2d9716f7819310a6f8.pdf?index=trueIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/baudrillard_simulacre_et_simulation.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/a_first_course_in_database_systems_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/sapikeke.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_1807ce2a28ee4591a0c47d05631b97e8.pdf?index=trueIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_a61b35ddd731463c8c792c61021d818f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99a2a52-4fad-432a-a158-5bd8b51db1d1/tekesotusijugu.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/defikisefukigimatidukepu.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/chhattisgarh_river_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d93cff-9d81-4b79-86b7-73926030fbf1/stihl_bg86_blower_spark_plug_gap.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_e3e05a1f3ccb40a0b5d9d4da093b507a.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 5464 bytes
SHA-256: 8f19518de26c60ca3c0a1fec64f7bfe89a0af46f0e0197d0c08e9b6211b9e723
font_01_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 11000 bytes
SHA-256: 448172e1ac819f2c05745b9de83b145238d7e9f80ebfec184e3806e27f684298
font_02_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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