Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa7b6eea1852aef…

MALICIOUS

PDF

69.7 KB Created: 2020-12-26 22:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee44dd171f7da0bcd91b2a735fd22905 SHA-1: 9b41c7c2b0740b4b382a4ef6a6decd455fab76cc SHA-256: 5aa7b6eea1852aefb5cc118e3fa775bb7fe30e43a9542a27de5ca96550a37d11
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=galaxy+reborn+second+empire In PDF document text
    • https://cdn.sqhk.co/reretukida/bphcijb/emergency_dentist_no_insurance_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fd993eb8fd0f.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/dV3bjfo/free_solitaire_no_ads_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5fe40585cbd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f95fce37738a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fbad6025cb0f.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/jb4idig/boss_battle_games_facebook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5fdb7e8d30011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5fdbd8f1db003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f870d053f6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_5fbf57d2d6177.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/jbnlhaO/kovepotasoguwuxakejadu.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/Ajiijie/bell_bird_feeders_new_zealand.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c08ad3c-c8ee-4dd0-94bc-74bebc15282b/m.extensor_carpi_ulnaris_innervation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17038a4c-4f85-4c9d-9779-a1fe3ef34759/femiminenemuseso.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_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 5560 bytes
SHA-256: 3e18d54a74ba2f584a7ae16a9eb341827cea8e46c51190845d07464c59b4d7da
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 10268 bytes
SHA-256: 3e527633c615a3f522780f2c4a17884efa5005eb7dd9a2259918299649591e9c

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