Malicious PDF — malware analysis report

Static analysis result for SHA-256 575cfd49c20bad79…

MALICIOUS

PDF

80.4 KB Created: 2021-02-14 06:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a728216f6f13b0822b8b01e6db576460 SHA-1: 1384e28c273ac77c47155a7b248bc533191d824f SHA-256: 575cfd49c20bad799fc604b148efc3358cfb706994c7b3592200083565ca4e96
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high heuristic score from ML classification and ClamAV, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'spotify hacked apk 2019', directing users to external sites for potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the link farm and phishing nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=spotify+hacked+apk+2019 PDF link annotation
    • http://ketadiets.site/android_studio_app_splash_screen9ak0u.pdfIn PDF document text
    • http://daddytestit.xyz/thinking_fast_and_slow_chapter_summaryq1pul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5fef94aa2e1de.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/piboravegisu-davipanovevux-girogavoboj-lomupino.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/iajahfU/montrose_point_bird_sanctuary_chicago_il.pdfIn PDF document text
    • http://parralax.net/norton_antivirus_for_windows_7_pcvtek0.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/gfNgdJ4/raidfield_2_online_ww2_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/cghujcw/pubg_game_ringtone_download_mp3_pagalworld.pdfIn PDF document text
    • http://paksorond.xyz/80109739306unhjb.pdfIn PDF document text
    • http://itayoga.space/divinity_2_original_sin_character_guide12hky.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_600d347532857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe92ad436811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_600185c48d16e.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/FhhjdbS/59772962761.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/babuxufarizuxur/bambusa_pro_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/76326398048.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/26354440287.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_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 5368 bytes
SHA-256: e8c123381e3c5825ec1a439b9744d11d2e00bfc753ef31f8a8838a0e001b44ef
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 10412 bytes
SHA-256: 25439692535352dadcea31530e328952f709605c23235a2257f8bc7c23727fd4
font_02_sfnt_off00012682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12682 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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