Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be9a9fa66b74779…

MALICIOUS

PDF

69.7 KB Created: 2021-03-08 01:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c407d2807e74f93196c2310a309e6e9 SHA-1: 07e52bd5a17ccc8249c9dc21119fc92cddf5950a SHA-256: 4be9a9fa66b7477950ec231e8e676468bffa423d041cb4f2f2a0f9c2feade2c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=lasko+ultra+ceramic+tower+heater+review PDF link annotation
    • https://cdn.sqhk.co/lakodatoli/51jhKjh/battle_city_super_tank_1990_ps4.pdfIn PDF document text
    • http://priz24.site/siwuxesek53uq9.pdfIn PDF document text
    • http://reduslim-eu.site/77876074310bz6nm.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/vXjeZE8/26346777767.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/gjbs5gf/battle_tanks_game_online.pdfIn PDF document text
    • http://magexaxajatadog.getenjoyment.net/wuxogasubajenen.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/vlookup_example_excel_sheet2wqdw.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/mix_design_procedure_for_m25_grade_concrete.pdfIn PDF document text
    • https://cdn.sqhk.co/wukiratuxazo/mlgjSKk/free_tiktok_followers_likes_and_views.pdfIn PDF document text
    • http://i-men.ru/bonupumusubamalonizonixhawv1.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/61616439337.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/nimuwet/hunter_x_hunter_dub_reddit.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_735baa07a85f4f409416f445b3f9a02e.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_8ebfea1ce8d5480288b1bc2b74a5f390.pdf?index=trueIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_c43666e068ad45c3b1a67feeb67f921e.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_b1c1e34dd2a348ccaad161268174921e.pdf?index=trueIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/32548086440.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_66c735d3434e4e9086306e09ff573570.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagev/asphalt_8_pc_ocean_of_games.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_00a4b25bb85c4cde81f1602a89b88a42.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_bf5f361b2b7243ff827b11573a630ce4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/cladogram_analysis_worksheet.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_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 5196 bytes
SHA-256: fa2b3c75fe6b6478dfb03c209b54b7a6bba066ea3661fe69e81e67da83c22c3b
font_01_sfnt_off0000e1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FE 11252 bytes
SHA-256: 5611f5d3b9437f51ce68208d6c9c0ef757cb21ed0294887e8fe7dd87ab8537ef

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