Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ffc1cd94499a5a…

MALICIOUS

PDF

74.1 KB Created: 2021-02-12 09:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a1040d7673465a455bb7de5fdc1b2258 SHA-1: 3608d383af009fb90598806f10ca9e9fc43b882e SHA-256: e9ffc1cd94499a5addc273c6608b38e51b1dd4481cde75d67ef01e401bd00f68
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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's a phishing trojan. The embedded URL, disguised as a case study answer, is a strong indicator of a phishing or malware delivery attempt. No scripts were extracted, but the PDF structure and external URI heuristic point towards a malicious intent to redirect the user.

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://baarspo.ru/wix?keyword=the+globalization+of+starbucks+case+study+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419828/normal_60125ee4aad6e.pdfIn PDF document text
    • http://autolombardpro.ru/tim_hortons_nutrition_canadajv109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_600e797f89c9b.pdfIn PDF document text
    • http://about-igsupport.com/photo_editor_applegzvcg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_5fda468b91595.pdfIn PDF document text
    • http://bioforce-co.site/wow_classic_warlock_leveling_guideq7g41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414352/normal_6008c09d4c5f9.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/blancanieves_cuento_de_los_hermanos_grimmg8da6.pdfIn PDF document text
    • http://tihefers.online/alien_vs_predator_juego_arcade_para_androidx18s9.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/gonafoziguwewe/butatazemuta.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/big_ideas_integrated_math_1_answer_key.pdfIn PDF document text
    • http://mudatelifawuvo.rf.gd/85581730488.pdfIn PDF document text
    • http://litopuputorer.rf.gd/fipovatibivunoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/18893273662.pdfIn PDF document text
    • http://tesoduv.rf.gd/xawikamixinerika.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/jusem.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/ali_yasini_talkh.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_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5680 bytes
SHA-256: 6bb32e25f72148ace3d77f053e23f29b3dd395490207d533d43f0742976fd8f9
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 10764 bytes
SHA-256: 2d0d4c2dfbc7124b1fd662d18666768621bda3bcaf8d819d1e9cb586da8e0828

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