Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8e75d96c80ad60…

MALICIOUS

PDF

71.4 KB Created: 2021-02-10 01:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bfb1135a07b2fccccd6f81bd928eaa43 SHA-1: 900bfb18deb5a392676e63e1f7a74c6cb584c82e SHA-256: 0b8e75d96c80ad60c9ae3de76c41e8633f12e3359768a6f376627a84ecbbed53
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 mimics a search result for 'heart failure guidelines 2018', directing users to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=heart%20failure%20guidelines%202018 PDF link annotation
    • https://cdn.sqhk.co/xuvisisitinu/ibhNcig/23222894288.pdfIn PDF document text
    • https://cdn.sqhk.co/divabasom/ja3ibij/pokemon_tcg_online_code_cards_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/igO5zhd/39937955183.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/igUEIgR/live_groups_champions_league_scores.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/MIiijbc/42759177233.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/jjk06dw/96909872235.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/jjiiyhe/14014003538.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/Shgwghd/jufojebojubesakazixoxukav.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/cjeSA7C/wonizipatifetilofawobimi.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/dfl22Sk/shooting_games_pc_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/oighbhi/90228144549.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/7geZhgs/hip_flexibility_stretches_for_dancers.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/jjgihdC/2641498777.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/d9MHb8O/51752691286.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/jusagi/utorrent_app_folder.pdfIn PDF document text
    • http://suvowafavij.epizy.com/sefege.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/47074944887.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/candy_crush_game_for_mobile_free.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_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 5556 bytes
SHA-256: 039b73f587d1558b7f225d79b774b2beecb91148406c302d4ce5ecde504314de
font_01_sfnt_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 10556 bytes
SHA-256: 58955fb62c58de5600356604ee9a7092a3a83d4c320ebed9e302690d463cbbc4

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