Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b7c45752ae14e8…

MALICIOUS

PDF

71.9 KB Created: 2021-06-10 11:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 236209d685f4b90fd35910fe2ba0da22 SHA-1: ab220220bac3c88e887c38ad66f296ed549ebcdf SHA-256: 31b7c45752ae14e8b62f129ca4ab0d3e6f8f58027f9c9ac9aea69bc87f07233e
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/pbw?utm_term=good+night+kisses+and+hugs+images PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403410/normal_5fdc4f5d324b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_6007afcf39e02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_604f9f9f8032d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fd6632140454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_602e37ea25301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_5fd161751f7af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/caec8ff3-46f1-4083-9460-1e99be25c6d5/how_to_calculate_process_cycle_efficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a25fd3-1500-4dee-a12a-848d4c98f3b5/zolutegupigawafijupuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf77359-52b6-45e7-8ebb-736f9c7a1565/90091766240.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/what_is_amazon_blue_badge_conversion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa73fd8-439b-48c2-9ec9-32ef363e9c3b/hisense_70_pint_dehumidifier_dh7019kp1wg_with_a_built_in_pump.pdfIn PDF document text
    • http://kiwuwas.pbworks.com/w/file/fetch/144681987/fexetejederi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfe56cd-8da0-4aa7-8f1d-2c37eb9e2846/95937732595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b36820a-16ed-472a-8d2e-af6834108ad4/28432529400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d6fb7b-2236-492c-9dd7-1c4595b0c7e3/mac_mini_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d20a030-fce1-43f2-b630-1e480e8152fe/kemokiwotanokudomekoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda39875-fbac-447b-874e-59f078289c4f/homicide_squad_new_york_cases_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca128ae-c156-43e6-adb1-4fe53f256444/give_3_important_applications_of_chromatography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf6db3b-0a82-4643-a2b8-34235e57e381/acer_aspire_v5-431_battery_not_charging.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/verbs_like_gustar_the_comprehensible_classroom_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 5204 bytes
SHA-256: 09944ed0740c8cab61f3665952115588a61186ada4b2d8b946fe3ff2689789ac
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 10776 bytes
SHA-256: 9051615b6caa87ad9149eff6dfea176a6c13edf0a0e48f1f331a4e3ab1eb2068

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