Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e50447286823a84…

MALICIOUS

PDF

73.3 KB Created: 2021-02-23 23:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4967ef6d766d5c81233dc1af333bd245 SHA-1: ccb5e111311583acbc5eae07c6e8c343c7613f9b SHA-256: 6e50447286823a84928202eff2c5129a52c12271079a1b8cd22d7d498d2b4015
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a second-stage payload or phishing page.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=how+to+open+black+diamond+headlamp+with+screw In PDF document text
    • https://cdn.sqhk.co/dodanadofu/MgclDrF/zozinenip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447252/normal_5ff80fa642399.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/JjfTH8H/enerpac_hand_pump_oil.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/iRjJJig/inception_soundtrack_slowed_down.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/jcPgcjj/9_months_ago_from_today_s_date.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/jOhiJjb/best_english_grammar_classes_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/fxhghgo/diy_diwali_decoration_ideas_for_home.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_602ee43fdefd3.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/if9Drjd/sputnik_virus_iran.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5fe861995c094.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/JwFhhih/sesobuxawuf.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/hgI3T7r/deemo_reborn_pc_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5fe179bdb9b65.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/UvjihgT/kodiak_tents_black_friday.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/jeddgjE/prank_scary_teacher_creepy_calling_you_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_60303f173f661.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/agdgjij/ffbe_war_of_the_visions_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467560/normal_5fde65548c69e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 5572 bytes
SHA-256: ebac6ad10d8882389af78d4c7b2c774cc791c48eb420ec073766b3637baa4adf
font_01_sfnt_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 11056 bytes
SHA-256: 56eacc4d9a839a761ca7186d4ce767a053499559c232ef04283a67673999583b

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