Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44b29ce165f94d5…

MALICIOUS

PDF

74.7 KB Created: 2021-02-23 14:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9105f2ad0b08df0386b69b33c30c915e SHA-1: 264607f77807a9e30b353ce4e1222ee7da795b49 SHA-256: e44b29ce165f94d50b89d5ddd8f710aa36f1dccd569d6b5dd61198c01ae84101
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-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://yafferge.ru/123?utm_term=cat+five+connector+color+code In PDF document text
    • https://cdn.sqhk.co/fojufifef/KgeHH82/woman_surfer_shark_attack_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/2u3aIgg/60349430211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcbaf407fc4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_602db50dd7b5e.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/FShhsje/merchant_services_chase.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/rjbNjdF/space_race_architects.pdfIn PDF document text
    • https://cdn.sqhk.co/nekuripafi/dRjduzO/armadillo_gold_rush_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/Jjjjbic/35805290620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_5fea21113d9a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_60335425c4059.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/Difhcih/7663202886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372753/normal_5fcb0b42ac45a.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/fopalew/suvezurekoxonox.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/59255380144.pdfIn PDF document text
    • http://nabunuwo.epizy.com/49207097593.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/98492771992.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD470 4804 bytes
SHA-256: efcf3a304cfadca7fedd33c71a9c0ae9b83c16d304e655347cd639485dd5aa34
font_01_sfnt_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 10412 bytes
SHA-256: 22863993cd9ca17d9876fec17009e7755b62e4ca0d151e9cd0602280912e1f63
font_02_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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