Malicious PDF — malware analysis report

Static analysis result for SHA-256 58619073d0845f4f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-22 19:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26a3ed1459a1ebb4fe5b138c8455088 SHA-1: 77dfc0fa96281f2b4094bd2c51775bfdf27c281a SHA-256: 58619073d0845f4f849f65783de0e47559d0ac1f59c32ce3646366c2e5329870
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, contains text related to the Apollo 13 book, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=apollo+13+book+by+jim+lovell
    • https://cdn-cms.f-static.net/uploads/4446155/normal_602dddb0ed39d.pdf
    • https://jutamuxenaritul.weebly.com/uploads/1/3/1/4/131452982/9792503.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/4143049.pdf
    • https://cdn-cms.f-static.net/uploads/4418175/normal_5fda81f896a7f.pdf
    • https://static.s123-cdn-static.com/uploads/4490528/normal_5ff15ee5b7ace.pdf
    • https://rifejirofedum.weebly.com/uploads/1/3/4/7/134763588/dukurosabejel.pdf
    • http://buybritishcat.com/how_to_use_cbt_to_treat_anxietyxjz4g.pdf
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/6978344.pdf
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5fc6898f45b44.pdf
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/fufilazire.pdf
    • http://zoxodur.sportsontheweb.net/kovumemiwelupaxapofap.pdf
    • http://regse.website/sky_force_game3e31v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxiruvud.myartsonline.com/index_imperium_2_vk.pdf
    • https://uploads.strikinglycdn.com/files/16d3c51f-0986-4956-aa90-bafaede105e3/widinumig.pdf
    • https://s3.amazonaws.com/widetunipet/25574646139.pdf
    • https://s3.amazonaws.com/zomuzigo/gb_whatsapp_7._35_update.pdf
    • https://s3.amazonaws.com/dovulavavo/97811100263.pdf
    • https://s3.amazonaws.com/vonusirukete/how_to_change_for_someone_you_love.pdf
    • https://uploads.strikinglycdn.com/files/60856ec7-4ff7-4e77-bdd6-df9a247930cc/phonetic_characters_keyboard.pdf
    • https://s3.amazonaws.com/kawotexulozax/36300266675.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_off0000efca.bin
834b1a360a8257281161c4df37d6c8934151f8920ae801eb0354ef5257dc84cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 5128 bytes
font_01_sfnt_off00010151.bin
b8e332fe75d73f2e814b0badce160a1e50458a75dd16c9ccde2811a454edbd97
pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 11388 bytes