Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3cc8053b6e2e0b…

MALICIOUS

PDF

77.2 KB Created: 2021-05-22 18:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10f690da8ed14d3e4aac95a176cb1981 SHA-1: 24267d4ed75d62db357fd677bc4cf54c9d8048c8 SHA-256: 5a3cc8053b6e2e0b441058858bf50347c917f853e4b9927c2c3dd2992b11b12a
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 0.9998

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 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://seumenha.ru/strik?utm_term=2k+game+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390374/normal_60525ca7b3434.pdfIn PDF document text
    • https://waridiregap.weebly.com/uploads/1/3/4/0/134095836/lifizuwunavidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422914/normal_5feb9d341d268.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/7559511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71929fd6-95a7-415b-a19e-004ac06e4203/fantastic_beasts_and_where_to_find_them_film_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0470500-cba5-4a52-88ba-a697e334c35a/craftsman_garage_door_opener_will_not_close_all_the_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0b9fac-9294-4756-b708-604c9094c3ae/88794340173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c5ec52-8faa-4048-8e83-2d66bcc3e238/how_to_replace_an_ottlite_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32049d8-5154-453b-8eb2-df968ebedcf9/8956192061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9b9d39-b56e-4b9c-b86f-6c4a281072d1/dukusoferupogufitabuge.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/bokamarifanagubatof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19d47cd-d48e-4352-9ede-815449c1d264/bangla_academy_english_to_bengali_dictionary_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190890cd-5589-461f-a113-63a12b29aeb6/is_the_intruder_showing_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76fc65dc-375b-4726-9b35-92506cbcf74c/3068762989.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/printable_comprehension_worksheets_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725a3c22-40b4-4a17-82cd-95bdb5c7f217/what_is_the_song_in_percy_jackson_sea_of_monsters.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/triangles_interior_and_exterior_angles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b102db-fcc7-469d-a30a-10a64c6181df/how_do_i_connect_my_anker_keyboard_to_my_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64063e6-fa9b-45ea-8bfd-2246bbacc751/40837933809.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 5488 bytes
SHA-256: f7c37532bd4d38cc1122b4dbe94b3bb61cf1f82a35e651d0a34a826025e71dfe
font_01_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 10988 bytes
SHA-256: 23938b8978821472aebb885ae90d6a3d3093863b09b5dcada3b42628e86555ca

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