Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2c191d331903b0…

MALICIOUS

PDF

87.6 KB Created: 2021-03-30 10:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c253cf73cab5584158451471f25a394 SHA-1: b900ee66e44ced27f617a4592c7256e6e07a9425 SHA-256: fc2c191d331903b0f0d0ac549354f42e1003bca9b47615c13e79c44e1e2cc30a
156 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 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 0.9993

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://jacksth.ru/award?keyword=autosomal+disorders+pdf PDF link annotation
    • https://mediwamogapani.weebly.com/uploads/1/3/5/3/135318379/9cfbdc1ca17.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/alessandro_scarlatti_stabat_mater.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/sunimanavuxuxelefa.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/49502736369.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/sibazuwox.pdfIn PDF document text
    • https://pisanalanuju.weebly.com/uploads/1/3/4/3/134352438/e60aaacdea6b4f2.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/6947691.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/47279791289.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/pdf_converter_to_word_document_free_download.pdfIn PDF document text
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/1669782.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/1b3337e67e72cc.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/tonisefoteka/talunodumibug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a970da9c-56ea-4705-8cbf-f3ab203a6a21/80599589422.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/atal_pension_yojana_scheme_details_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/facebook_advertising_template_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287deef8-1263-40bc-8e8d-4a814b6eb07e/probability_notes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/king_size_fitted_sheet_patterned.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/autocad_commands_with_examples_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/25210803877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b742e7d5-edff-45a8-a9c0-061b65bfa0c0/old_troy_bilt_tiller_attachments.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/55510076057.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/wowezesezimufoxuxodot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e173cc-94ed-485b-8890-b323eec35e4b/busagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb319fb1-f4f7-4921-b75e-f8caada62ca8/27628484028.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_off000118b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B6 5176 bytes
SHA-256: b493882fecd90d8d70416dc00b9fa6bb16431a1bac90462882254e71005c8ba5
font_01_sfnt_off00012a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A35 11392 bytes
SHA-256: 5c224ee70a357d750129f618ab5128091afd8d0b1e867fa15a96fc10dede0110

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