Malicious PDF — malware analysis report

Static analysis result for SHA-256 069b97ea74eb62ca…

MALICIOUS

PDF

80.0 KB Created: 2021-03-31 08:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b43d175d21cedab7693ed58f499534e SHA-1: 383fbee2eef1ff8733e38d153ebd47fadc60bae3 SHA-256: 069b97ea74eb62cae57192e89038d047a106e0c46430e4d317c666e820f4ed1b
186 Risk Score

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 6

  • 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.
  • 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://dafemum.ru/wix?keyword=law+and+order+svu+episode+learning+curve+cast PDF link annotation
    • https://cdn.sqhk.co/jefigujaxev/UZiakih/high_sea_saga_tavern_rank_s.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/gJjfggl/mind_games_1989_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gDwBczK/drawing_a_line_in_adobe_acrobat_pro_2017.pdfIn PDF document text
    • http://mibebar.22web.org/37309581040.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/pasawe/31550420992.pdfIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_0c5131a88c434edcb54e369d49a723d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1126d6d4-c8c5-4ec4-8cf3-1a6ecf45279a/68134867796.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/how_to_install_cracked_minecraft.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_bf1a61fe8ba141bd8923fe9b178aa727.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f56c53-48d5-4dce-a3b2-873125e722fe/what_if_netflix_cast_kevin.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/bofebize.pdfIn PDF document text
    • http://mirajeramevex.rf.gd/cc3_selected_answers.pdf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8178df88-70f0-4fb2-ad0f-0b07f7e39ee5/kjv_1611_facsimile.pdfIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_77d0e8c01a50408bbb72b10327e8fd35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/vampire_diaries_season_1_episode_14.pdfIn PDF document text
    • https://765a5d72-5774-4a4d-a421-5c90307110ba.filesusr.com/ugd/f2a868_12f76ba6f4fa49339c34025166345447.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8f3146-f6fc-42bc-9edd-62709395294f/dukupufozaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ee56d8-c4f7-42d3-bb0f-98b22ff3bc57/15550608856.pdfIn PDF document text
    • http://vepipivozox.rf.gd/polozemenogaxupituw.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/street_fighter_2_apk_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b03f4f-0836-4da8-99d5-3e3dbb48e58c/scid_5_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba0b4c4-820e-4cc2-bcfe-1a5dad93ae80/3654073570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e075d88a-54fc-4293-beaf-1b9716093fda/40673215973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e4d597-791c-4142-8d16-0d8722ae45f5/cub_scout_tiger_handbook_2020.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_off0000f89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89A 5336 bytes
SHA-256: baa43d8fd42d44e01f11204cc4646a738716afab616686b45c1d8a2786fcd959
font_01_sfnt_off00010aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 11612 bytes
SHA-256: e65d400189628ca6d00014fbbc1deebf0e65da29c1950e2bd79c4fbcc6e5f951