Malicious PDF — malware analysis report

Static analysis result for SHA-256 913469d7346400e2…

MALICIOUS

PDF

82.8 KB Created: 2021-05-13 10:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4d2364adbe5773c29c549051bdbdcb85 SHA-1: d58ebcdc2882f45dc7bf25e2e65e53ee4c851d5d SHA-256: 913469d7346400e2775a656c022440e879abd2ed5dbb08abc5d2099726345059
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a search query that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=where+is+the+battery+on+my+dell+inspiron+15+5000+series PDF link annotation
    • http://leadtop.co/how_to_find_your_work_permit_number5u31n.pdfIn PDF document text
    • http://gufutaca3.xyz/multicore_architecture_and_programming_technical_publicationsmedah.pdfIn PDF document text
    • http://pc-remont.website/adobe_xd_tutorial_freep5o7e.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/finosulegii22n3.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/N8KQidH/learn_how_to_invest_in_stocks_for_dummies.pdfIn PDF document text
    • http://kinorio5.xyz/saloxelonelmj4p.pdfIn PDF document text
    • http://site-shop.xyz/43811617087srccf.pdfIn PDF document text
    • http://slimerecipe.org/109513942529rw9b.pdfIn PDF document text
    • http://parhelifrl.space/78252577087gmoit.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ps1jfpp/logoredasuko.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/Rjh6HSR/pac-_man_world_2_pc.pdfIn PDF document text
    • http://shoes-storie.club/long_range_shooting_handbookq6jc3.pdfIn PDF document text
    • http://gamedv.design/jebevz0hzh.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/pegozegi/change_reset_password_email_template_laravel.pdfIn PDF document text
    • http://nodimetonakijeb.epizy.com/government_jamb_questions_and_answers.pdfIn PDF document text
    • http://nerozufigepa.rf.gd/nitecore_charger_i4_not_charging.pdfIn PDF document text
    • http://tukudizu.rf.gd/fpsc_challan_form_bps_17.pdfIn PDF document text
    • http://kavunuses.epizy.com/buriedbornes_saint_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/song_bring_sally_up.pdfIn PDF document text
    • http://tewojaxosu.rf.gd/zetidugim.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/os_cavaleiros_do_zodaco_dublado.pdfIn PDF document text
    • http://butokerisutu.epizy.com/magnetic_effect_of_electric_current_class_10_mcq.pdfIn PDF document text
    • http://fobifuv.epizy.com/bk_precision_8600_user_manual.pdfIn PDF document text
    • http://gekuwixaritaxe.epizy.com/hillsboro_school_district_calendar_2019-20.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_off00010165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10165 5772 bytes
SHA-256: 3319b8ebf9710d76d380b57fe11049eaf764cc7898e3951aee32285e472dae16
font_01_sfnt_off000114fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FB 11824 bytes
SHA-256: ef9313fee0e18ec116419b81ec935c373edb635a25dba80247c302c85bc0e60d

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