Malicious PDF — malware analysis report

Static analysis result for SHA-256 033ea97ced8a3e10…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 06:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 206e183e0827d9c7eaa32da439237007 SHA-1: db4ec0c52a8160098190e8c5b38eff14f7908f51 SHA-256: 033ea97ced8a3e10f3c128eae04faafe17119059643fff0c284a7f4a3aea68a7
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 0.9998

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://dugedepap.ru/wix?keyword=repetition+in+the+declaration+of+independence PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445326/normal_600b7386a9156.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/93273914590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_60303e176f3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5fee296b8f828.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/reviews_of_keurig_mini_plus_brewer.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/lovej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_53cc2624472b457c85a1898229786e38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00827e04-9b2a-4224-89c5-9a30b941c730/bumawofaxabapazi.pdfIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_dda67ef8c268444e941efa02074b7304.pdf?index=trueIn PDF document text
    • http://tozopovudot.epizy.com/beautiful_flowers_video_free.pdfIn PDF document text
    • http://nawokuzowurib.epizy.com/barcode_font_for_excel_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/is_there_a_fuse_for_car_heater.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_94cd6ce82aeb44a88423d4846179a8c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/zebug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c11206-3de8-4d56-bfe9-ebdeed32c61a/la_biblia_catolica_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/97828352598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41af0c38-1e45-430d-822f-ac524d74b8b7/25625143299.pdfIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_df2be7d13b2742a589b55064c90957ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/gogolob.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_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 5072 bytes
SHA-256: 9299585a08e530c98f1e7eca114c0173865955014344725f412be3adb7a04a9d
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10864 bytes
SHA-256: c723aaef7d08e601de744207e9ba936284feb589387a7a07f099bc38780cd3cd

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