Malicious PDF — malware analysis report

Static analysis result for SHA-256 da40b840f2b7802b…

MALICIOUS

PDF

84.2 KB Created: 2021-04-08 07:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c095494a819a29b534e24800f4ca9a4a SHA-1: c65163fbe762d9fb7e9d2582551ce976a99ed21f SHA-256: da40b840f2b7802bcf6450f906ce37763e230debc7d5e00125ea4a9f542d7537
126 Risk Score

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 0.9996

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://maypoin.ru/wix?keyword=honkai+impact+3+beginner+guide PDF link annotation
    • http://fuvusawomere.22web.org/luwogojijukagagenosafuda.pdfIn PDF document text
    • http://lozhobelir.space/echo_leaf_blower_will_not_run_full_throttlejiivw.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/uhebCjg/xatezitowunex.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/inGigje/rounded_bullnose_corner_trim.pdfIn PDF document text
    • http://sadovik.me/how_to_do_shadow_puppets_easytjj1i.pdfIn PDF document text
    • http://detonic-ordina.website/atoms_and_molecules_class_9_short_answerh05bu.pdfIn PDF document text
    • http://lightly.store/is_procreate_available_on_windowsd8wee.pdfIn PDF document text
    • http://bloomwithdeanna.com/diary_of_a_wimpy_kid_online_free_moviezubt7.pdfIn PDF document text
    • http://oneitshop.pro/9979953173908jui.pdfIn PDF document text
    • http://organicnu.info/what_is_the_warranty_on_a_john_deere_battery483fz.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/8Q2idIK/borderlight_live_edge_lighting_colors_to_contacts.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/CK4ieie/box_office_meaning_in_urdu.pdfIn PDF document text
    • http://whowill.ru/laserjet_p3015_roller_kitu4wr3.pdfIn PDF document text
    • http://retys.space/pulumatogibadarokuvudud2av8b.pdfIn PDF document text
    • http://maripifedama.22web.org/91071880147.pdfIn PDF document text
    • http://parralax.net/ncaa_division_2_basketball_tournament_womensmx9hc.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/kovilowab/45867242485.pdfIn PDF document text
    • http://wofaxetelojowow.rf.gd/bogalusa_heart_study.pdfIn PDF document text
    • http://niwaraz.epizy.com/34352837212.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/insulation_roof_sheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 3344 bytes
SHA-256: c0c0788e3e8c74b0048e12959e695632cc5621cb1efc7ca50e7fc5b0c87ddecc
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 5512 bytes
SHA-256: 61087a45b7a1ce2754870d53a6b5549cdbe5c0fcd81843541cf8942ec8e8c962
font_02_sfnt_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 11008 bytes
SHA-256: 00a92f72e91268ed03bb7b0fca4ece19ac1f2a5c63ae33443ca70237e7fc9023
font_03_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 16300 bytes
SHA-256: 50be03039280c2f0ebc0cf05283448df59e155e068328f198b6144514623ca2f

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