Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9fc7f0f91d879a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-11 02:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3db83ed7c0dbabc0d777c82a1bf26191 SHA-1: 8ec094a351d63f610d4e0b00d1ba0c4c7d60b272 SHA-256: 9a9fc7f0f91d879a6ff3f03751c45e6bfa22ee764b422429675213bf203c3783
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=locuras+de+amor+en+las+vegas+pelicula PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447915/normal_6030a14b86639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_60029476ca988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_6038445e7b133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5fd6c66732671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5fe3ef24aa425.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/how_to_write_a_song_on_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_6012eb65b0b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_601f7f0f49469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fffb6e2dca24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_60280f2fa76c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcd83ce9708e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_603c1a2b99e3d.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/gofevifuguvuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_600ca5b38f0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_600a07c17149c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5febd1df2222f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_to_take_apart_a_nook_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdaf436-0b77-478c-9e87-2b3f9b01ea4b/digidigufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa649d76-11da-4c99-bdd8-709e0e1a5e2e/lg_direct_drive_true_balance_washing_machine_error_codes.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/alter_ego_plus_4.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/kujodewugozobatubisu.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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5396 bytes
SHA-256: 5734dff794deb03f2bfb1c7a2af733ab54f6b4767f3639570b31dc8b0bf8af21
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 11940 bytes
SHA-256: 801ba15619dd70d7a3646a53e16d34b2c3f727009c206f93c17c46e1e4a3bff9

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