Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0978f532cade15…

MALICIOUS

PDF

109.9 KB Created: 2021-03-18 23:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7443b0b52f15051a1b429de4673ea185 SHA-1: 2565985da5fb374d5e2e87f74489dedae6866331 SHA-256: 5c0978f532cade151c87ded458de7525de7afbe3603d2001ad49ac419a9f03f6
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lure users to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/123?utm_term=harvest+moon+back+to+nature+seeds+guide PDF link annotation
    • http://mixutadumekaje.mypressonline.com/caracterizao_da_turma.pdfIn PDF document text
    • http://maykistore.ru/descargar_crash_bandicoot_para_android_completoftum5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_6007525a36244.pdfIn PDF document text
    • http://kernig.store/281417003868v1i1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_600ffc6ac133f.pdfIn PDF document text
    • http://naxiziwakeguzor.iblogger.org/uk_immigration_test_questions_and_answers.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/tasutejazomivefuwobunexi.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/map_of_europe_countries_and_capitals.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fc6df4050bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_600fafce6692f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_601e4af5b8a1b.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/84698361325.pdfIn PDF document text
    • http://procripton.com/wilalirixugob9yho8.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/zemunomipazikez/stephen_hawking_als_age.pdfIn PDF document text
    • http://kafopazam.epizy.com/solubility_curve_worksheet_2_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/architectural_fonts_for_autocad_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/19860317754.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/zuxomeresiwasepiliret.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/42372052072.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/76591543721.pdfIn PDF document text
    • http://xubufusizosawud.epizy.com/xiluzosuvuvixojegevizi.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/collocations_national_geographic_learning_answers.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/dell_inspiron_n5010_lan_drivers_for_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/3506469731.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_off00016d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D4C 5452 bytes
SHA-256: f07160f9ee99649fcb521d40eeef5c4f8aaaadb1d86e3f6cc29fb95eb9a5e57b
font_01_sfnt_off00017fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FC8 11876 bytes
SHA-256: f1a888d4621f18149ab1f10da540f817be0b292976b80da18857a906e447d2f8

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