Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52da3c8cfd2bc89…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 06:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efba74f3f46afdd09c722cfa9014fa88 SHA-1: 78e317cd45039ff8fece3c5e2549f2a0f51b93b8 SHA-256: e52da3c8cfd2bc891c16678cd3d44c9e3713cda125dadde24e7076f9be2f3abf
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it is a phishing trojan. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate a potential for malicious JavaScript execution, commonly used in PDF-based attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=elaborating+sentences+worksheets
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6019c1f16517b.pdf
    • http://zikizitepef.iblogger.org/whats_the_social_contract_theory.pdf
    • http://lisipezasuk.iblogger.org/oracle_hyperion_smart_view_developers_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4401732/normal_5fdd219eaa49e.pdf
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60210d054b2ce.pdf
    • http://bodurum.iblogger.org/belong_to_you_vi_keeland.pdf
    • http://notirebaxomuw.iblogger.org/84866984492.pdf
    • http://supesanav.iblogger.org/rajomikanina.pdf
    • https://cdn-cms.f-static.net/uploads/4456999/normal_60230a42e216f.pdf
    • http://vewigufirenaw.22web.org/61598614621.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fafuwite.epizy.com/what_are_smart_textiles.pdf
    • http://xipobibupo.epizy.com/questions_on_periodicity.pdf
    • https://uploads.strikinglycdn.com/files/c351b2f8-450d-41c4-806e-c5161f8fa633/step_by_step_scratch_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/87b04c9b-12fb-4c94-ab0d-b1ba6b6993d6/wendys_cheeseburger_nutrition_information.pdf
    • http://fapugiv.rf.gd/79720210645.pdf
    • http://zerakunutage.epizy.com/19491110308.pdf
    • https://s3.amazonaws.com/kewakuko/best_android_tablet_2018_philippines.pdf
    • https://s3.amazonaws.com/lorifawuvawot/hengeyokai_shapeshifters_of_the_east.pdf
    • https://uploads.strikinglycdn.com/files/3d6f2ea5-7e63-4b04-a9e0-0c52e8a70e4a/is_the_handmaids_tale_worth_watching_reddit.pdf
    • https://s3.amazonaws.com/minabiwa/31146640025.pdf
    • http://lafumiseweno.epizy.com/99442837201.pdf
    • http://rolaxaja.rf.gd/xisufafoluriwilikop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb6.bin
c732d42bc70410e27a98af47e4719dd29f640e6fa54bb73f30d8e837fb783234
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 5316 bytes
font_01_sfnt_off000111da.bin
5d6bf17fd252f6178bee9eda46927b6f49b4e7b08bc8713d7786e3dfe5f98dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 11256 bytes