Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63aadcc7815c297…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 09:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a37a5e0c0bfa41617ab43a6564e53e11 SHA-1: 5ab86f8a5b632b5b88f6f9dc570a4fa1afb719e7 SHA-256: e63aadcc7815c297c8fe6943a7df7a84667ca5b7870bfd34cf26374b920f6563
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=avg++for+windows+7+64+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374715/normal_603cf3af5fede.pdfIn PDF document text
    • http://prizinsta.site/tizofila49ya3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5fe8240f47bb3.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/yXjcjb5/craft_warriors_mod_apk_4._2._9.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/KjeiigG/dream_girlfriend_apk_mod.pdfIn PDF document text
    • http://doordash.link/adventures_in_middle_earth_playerflviy.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/3Vhj46m/28652558964.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/baby_goat_yoga_orlando.pdfIn PDF document text
    • http://megatorg.ru/writing_good_thesis_statements_worksheetgr62c.pdfIn PDF document text
    • http://moymagazin.xyz/76586644672ccxdy.pdfIn PDF document text
    • http://swiss-gear-top.xyz/how_to_reset_samsung_soundbar_remoteybwle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fca3d5d5c867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_60255abab1f49.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/g5Kjfgi/22409036699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/zenoteluka.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/android_exception_java._net._unknownhostexception.pdfIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_b649974c13b34171b61d833f5528b855.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/xuwedatatusisomazuvez.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_d2b143de27214a8f907191a3e4ed575b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/hibiscus_petroleum_berhad_annual_report_2019.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_c437c10749734cac997668f72cb2a309.pdf?index=trueIn 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_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5436 bytes
SHA-256: cffea40bdd7bc9294f431e9f3666b4f4b7a46c5c9422095a16140c5d15564f8d
font_01_sfnt_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 10696 bytes
SHA-256: fcc44ca37f5c22f3dfca1de9055bd2f083598b76c3d598d59341750dede4911b

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