Malicious PDF — malware analysis report

Static analysis result for SHA-256 b036e90526b2ffa6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 14:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 653b32230d7f25a5a529634cc5b4e878 SHA-1: af312d821e570da787bbdea27252ddd421a46b8b SHA-256: b036e90526b2ffa66af590bd92040ffb8aa1ed479a16f2a6125f1bcb3629d5db
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, https://maypoin.ru/wix?keyword=section+7.1+ionic+and+metallic+bonding+answers, is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to academic answers, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=section+7.1+ionic+and+metallic+bonding+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420449/normal_5fe4a94d9fa9c.pdfIn PDF document text
    • http://gta-msk.ru/42000159397uak1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_600bf43b55f80.pdfIn PDF document text
    • http://dom-bita.org/telecharger_template_joomla_3._9_gratuitquti1.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tofizo/gamuxuwefikobumavemutew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec24b029-8d07-4c14-93d0-c8567b7be0fe/gogetuti.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/afro_cuban_rhythms_drum_set.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/12054212493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db524dc-35b4-4240-9f03-a314978e3935/baby_gate_parts_target.pdfIn PDF document text
    • http://xixonuw.rf.gd/nabagugumizezogoxaseb.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/autocad_student_free_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e7ab64-ad38-4daa-a458-d7824156fdc3/what_happens_when_someone_steals_your_ebt_card.pdfIn PDF document text
    • http://pavebutom.epizy.com/jojigumenizivawaruli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a542328e-9883-4162-a75b-8a8f4633ae38/how_to_make_rose_water_at_home_with_fresh_rose_petals.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/pool_party_flyer_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/psychotherapy_cancellation_policy_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 1768 bytes
SHA-256: 7b9c1ad248dcaef01c7adb4df71c22141da68cde87cc5ccff7cadb2d821898f4
font_01_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5756 bytes
SHA-256: 5d7bec63a6107299ac6cd6928585fa23701ca7d9cb8fb92e54b5e0306374becf
font_02_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 10560 bytes
SHA-256: 07f9a32818475a31286b15bef1e3ae18baf3481d9767f4920abb85c1deb3cd7e

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