Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87ba3da1749caea…

MALICIOUS

PDF

87.6 KB Created: 2021-03-03 01:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 47d17fb856986b209f91852123bab225 SHA-1: 243a92a6627a0688ecbe821a487a84a0b6088fa5 SHA-256: f87ba3da1749caea8969363e604f8183d10e14d2befdc890fc0e095ae8e0cbc2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to 'lozipotod.ru', which is highly suspicious. The document body, though heavily garbled, contains text related to a 'Mesa boogie dual rectifier maverick 1x12 combo', suggesting a lure to attract users interested in musical equipment. No scripts were extracted, but the presence of an external URI and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=mesa+boogie+dual+rectifier+maverick+1x12+combo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472494/normal_601601198dbce.pdfIn PDF document text
    • http://vulgargirls.fun/cara_menyelesaikan_score_hero_level_4006d0ur.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/elements_of_design_color_picker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fe61f97d5440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_600ce3bc3c5db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_603aca62959c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5feb62a54e508.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/mDYgfjN/zurekop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5feb5e4436c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/Yggewib/mobile_classroom_bus_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_601a1b9a2d42b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/waxegatulo/lagu_vrp_kamikaze_play_with_me.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/wavepad_master_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/baguronefonesitog.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/android_sdk_location_windows_10_visual_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/how_to_auto_sort_worksheets_in_excel.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_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 5636 bytes
SHA-256: f6d2cac3876601e5aba3162d0bd778a46713e928df4bfe463bbee9398fdba3a3
font_01_sfnt_off00011c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 11392 bytes
SHA-256: e1e12f129fd924ba290f37a13e2f5628e47208ea457360db3cd54dd7a4f36969
font_02_sfnt_off000142c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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