Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c642eab57992f73…

MALICIOUS

PDF

79.5 KB Created: 2021-05-16 19:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b650b62a2161d253ccb9b325e14e7c1 SHA-1: 220f1166d44b607ec203157ef9f6c50a6faeeb01 SHA-256: 1c642eab57992f73d3ee88d2aec279b7b062335c6516c0a19ea0567efb32c4e4
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 0.9994

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://soxebez.ru/strik?utm_term=crock+pot+express+quick+pressure+release PDF link annotation
    • https://lozoliso.weebly.com/uploads/1/3/4/7/134775557/5591811.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/b2je9qz/buvokufobelol.pdfIn PDF document text
    • https://bevalapiwilidi.weebly.com/uploads/1/3/4/5/134587476/2856266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_5fd8fa570e89f.pdfIn PDF document text
    • http://avtovishki-msk.ru/general_occurrence_report_templateqe790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470526/normal_606b62796c139.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/ighXMhc/atualizar_android_tablet_samsung_tab_2.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/soxaleluxawuganupudo.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/hbrzD3G/somelegokuker.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/6e1eacaaac875.pdfIn PDF document text
    • http://instapodarok365.site/kelisumnmp2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_602ca1358ee71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_604572bc080c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe5450333ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/hhgyhiC/hello_neighbor_2_alpha_1_code.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/chuyn_file_c_hnh_nh_sang_word.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/hfihhhu/mcintosh_apples_good_for_baking.pdfIn PDF document text
    • http://gufutaca1.xyz/learn_japanese_for_free_with_kawaiinihongo_apknjhns.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/3e831412-86a5-44ad-8d4b-c16ec4de5c85/koguwixoxamokakole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ef7d87-5cfb-4004-be64-1aaae392713a/best_coding_books_for_beginners_2020.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/menusozogutejasuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487893f9-babc-4602-b240-ed06d4c278d8/21337804977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9496d7-72c6-4949-9c66-854fd3ef0d4a/2008_dodge_avenger_starter_relay_diagram.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_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 5092 bytes
SHA-256: e3656c59b18a997331a3e9de322dcf9a47c59037e384087551f0f47891e3edbb
font_01_sfnt_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 11164 bytes
SHA-256: a84dbe049cff1fd150a3e8f69bbdaf4e7f1d5a9cb26dc8c0de1132d128da4398

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