Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7964835a9b732fe…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 12:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b05f0eb90b70de66c63cac8910110fa1 SHA-1: 0d72f0027ba27f62d546d6984d2d7daab036e5ff SHA-256: a7964835a9b732fed314a0e4e3ca92f39594cfdcdfef30465b3593a1050a5388
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'Disney cast member passes' and includes numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of these characteristics strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=disney+cast+member+passes PDF link annotation
    • https://cdn.sqhk.co/sidogorego/YVgibOa/28107513355.pdfIn PDF document text
    • http://haifaiv.ru/how_much_sugar_is_in_dunkin_donuts_hazelnut_swirl26hi1.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/jbNarii/clubhouse_restaurant_oak_brook.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/ifjeKLE/magekekeririkexax.pdfIn PDF document text
    • http://datab.vip/zeluwew719.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/OieigAi/jr_winterhawks_spring_hockey.pdfIn PDF document text
    • http://purpless.vip/zadojanoruwotere3dl56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5fe4cfd5e6d19.pdfIn PDF document text
    • http://eroganoficial.site/bidufixalekejaze9y6p9.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/igggLBv/29202171678.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/izhcgjN/jowakobaxutufuxuxavixi.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/Ahridij/spider_solitaire_game_free_online_without.pdfIn PDF document text
    • http://instapriz.website/teachers_college_columbia_university_tuitionyrf6f.pdfIn PDF document text
    • http://karma-911.com/85636592279d2hx8.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/jivagajamav/pride_scooter_victory_10_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/landscape_design_and_management.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/opencart_arabic_language.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/zepikamo.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5288 bytes
SHA-256: 26cd7aabc039573d608037d711dc7cf46259be559fdeb0e9227ce2383977c3cf
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 11604 bytes
SHA-256: 714f5cc9000e58a0643d2a9fca2b26e9df7312a0b6b035e8767f034c72e10c21

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