Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f86e4d873653f0…

MALICIOUS

PDF

76.5 KB Created: 2021-03-16 23:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 561d6dab780c45934e726e28c58afad7 SHA-1: b2a39a117d04ebf32ce45aaf5ed2d6fb8c789c47 SHA-256: f7f86e4d873653f04b233f2a203555132a23f95e8949c649efa7030577c948a2
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://druttle.ru/123?utm_term=counter+strike+global+offensive+maps PDF link annotation
    • http://bonifacy.site/como_conectar_mi_android_a_whatsapp_web667gb.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/warrior_cats_books_series_1d3dn2.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/injection_bijection_surjection.pdfIn PDF document text
    • http://justiciaforjustice.com/14732005842q60be.pdfIn PDF document text
    • http://idem-peshkom.ru/bypass_proxy_android_mobilexwfie.pdfIn PDF document text
    • http://help-copyrightservice.xyz/gadeviganotuma4g512.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/d3c1d7d7-ee29-4aa2-8156-3b01b828ee9c/zozizekazor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26094ca6-a5f6-411c-9192-e3a677415823/xuveloxelox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd68f393-2fdb-4950-a346-d4ca29a71e3c/14133309375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d77cd07-b3f8-4cec-9cf0-d459e9538feb/xudonijimumosewor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec9e465-92f0-4d8b-8308-f8756b871766/beethoven_para_elisa_partitura_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0ecee9-7c29-4b2b-8cbe-1b09767baa63/pure_rally_racing_drift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd956c31-8fda-42b8-815e-76528db58ae0/23006174508.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/what_is_one_example_of_a_nonliving_thing_in_an_ecosystem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9f475f-367f-4a1c-9ac6-83c968500a8f/fewuxipoweloza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4653e1cd-9eac-468d-ba13-79fc4622a2bc/haynes_repair_manual_for_2007_dodge_caliber.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_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 5392 bytes
SHA-256: 962e3aef12f2dbd21151dd86e9cbb92aa79ed04b5a3a8da86c076723cc52c55d
font_01_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 11180 bytes
SHA-256: b60fff0c89ff472e0e29999a7c8caef97b777ba56d41366d1b7060d7f53b90e8

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