Malicious PDF — malware analysis report

Static analysis result for SHA-256 1793f8d71789c6a5…

MALICIOUS

PDF

74.2 KB Created: 2021-03-14 00:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3567518e910ba93a590c0428733091 SHA-1: bae1ed54fd9a12f3ab47784f8e249577fa6aada3 SHA-256: 1793f8d71789c6a59cb8429927c8949b659f0f32fab9c030d2b11d4eaad3297e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing for personal information or delivering a secondary payload. No scripts were extracted, but the overall structure and embedded URL are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=early+retirement+extreme+pdf
    • http://arm-watch3.club/96651432508wqpey.pdf
    • http://snail-case.store/different_types_of_spur_gearsflrzo.pdf
    • http://werategaxa.iblogger.org/the_cremation_of_sam_mcgee_answers.pdf
    • http://jerubapuruzol.iblogger.org/38461472639.pdf
    • http://dewiluvafaridi.22web.org/cd_booklet_template_word_2010.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://segegasagemoxi.rf.gd/tepabija.pdf
    • http://nagomekivi.epizy.com/1988_ezgo_gas_golf_cart_wiring_diagram.pdf
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_d6a403aa51424ae297a0621694752a96.pdf?index=true
    • http://jopatodorijapu.epizy.com/treasure_trail_guide_osrs.pdf
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_c13264aeb7d34226aa80529e96b2177f.pdf?index=true
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_341781065ba44aea997124cbf7d743bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1494ab4a-622b-460a-b3a0-5989935b7be6/what_grade_level_is_the_lion_the_witch_and_the_wardrobe.pdf
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_83e89f2ad87e4b6cab030d7c1c03eed4.pdf?index=true
    • http://zunufofidufup.rf.gd/rulonenaporudinobafomu.pdf
    • https://uploads.strikinglycdn.com/files/5a676642-eb7b-40e2-b98f-22155b0d4599/areas_de_aplicacion_dela_psicologia_educativa.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_off0000e57d.bin
05a1e1825de9f94433e7fe94f3b3e53fec34c3ace2b442a0f3f13ef16944d4a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE57D 5136 bytes
font_01_sfnt_off0000f6f2.bin
4bd92f6ebc7a151a9ef74c940f3d168bceef041334b82d7dd1f492a7bd8c0221
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 10860 bytes