Malicious PDF — malware analysis report

Static analysis result for SHA-256 042824363e67899a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-27 11:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c56fce8171c2bc07ccda7b4fc7e57880 SHA-1: 08804c08d071bc1712cda455412ecb563be6b5ec SHA-256: 042824363e67899aa1f3fc226a94b7305b9a753668868a93dd032da6e425669a
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it's part of a link farm designed to direct users to other potentially malicious PDF files or websites. The PDF's structure and embedded links align with tactics used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=simple+past+tense+passive+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369304/normal_5fdeacd7cb6d8.pdfIn PDF document text
    • http://jotaxanalesuti.iblogger.org/whatsapp_free_for_nokia_lumia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_60136a4175663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fef3ddf7221e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_5fe86770beb4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498702/normal_605ee72e2dec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483836/normal_6004ea36c1468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413474/normal_5ffa3c24b5f58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fc861f7480d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fd2a53a3ba1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492880/normal_5feb4abb15afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_604cf41f39d54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5ff936c09ef7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409256/normal_6054ff43e3e02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_602ec311489c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_6052b11bde02d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lizebij.epizy.com/how_to_remember_the_7_gifts_of_the_holy_spirit.pdfIn PDF document text
    • http://zasuzutan.rf.gd/best_format_to_write_a_book.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_c490bd739c454aa09e4e865c99bd6e3c.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_a6164e43b8bd4b70b8f76fe4baa151e9.pdf?index=trueIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_12c38c5ecd2542ca840725a73382d643.pdf?index=trueIn PDF document text
    • http://bugelinuxobeva.epizy.com/house_rental_lease_agreement_template_ontario.pdfIn PDF document text
    • http://dukiduzafenej.epizy.com/afterglow_ag9_wireless_headset_ps4_manual.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_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 5532 bytes
SHA-256: e69a19cc0279b5f7d4eb824b4ac8e76cbb5cc2b757de2600905eb47e6f6c1655
font_01_sfnt_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 10172 bytes
SHA-256: 9084489c027d970fd19a48d831970a1845ba1d6aff7ea8e534625419ddf434c1
font_02_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

Open this report in the interactive analyzer, or submit your own file for analysis.