Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f9200321a7d6ee…

MALICIOUS

PDF

97.9 KB Created: 2021-05-11 00:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2c9f3c28de305f75cdff739467b43c2e SHA-1: 702a26c46a99b10df9a389eb657c5e2c720aef48 SHA-256: b9f9200321a7d6ee8d0b32be36ef3b11692dda44eb692600283b68d36a6c3ef2
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. It contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments that suggest a lure, and the presence of embedded URLs reinforces the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=mental+status+exam+ppt In PDF document text
    • https://cdn.sqhk.co/pulovafafita/hd0zleI/photo_effects_filters_free_online_photo_editor.pdfIn PDF document text
    • http://carishr.com/poblano_soup_recipe_cream_cheesect4jr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_6067d4803780a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601be1fca5950.pdfIn PDF document text
    • http://zubiki.top/diwenakegorubuvovurikodcamem.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/iaQ7cif/84052603273.pdfIn PDF document text
    • http://presente-top.store/flysky_fs-i6_receiver_voltagek622x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_60561ea0504b8.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/hd5Rih0/esc_valvular_heart_disease_guidelines_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_6054bee273f4b.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/Fgcif4J/snapchat_logo_red_neon.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_92c32e1edd364b98990fba9fa24622cf.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_dbe951059a5346b8b2123892d7aecc2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e98c4d9-a9b9-42df-815d-94493b16c8a5/cursive_letter_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2993d8ee-1977-4cfd-b02e-a2b0f85dbe00/kasufabakasaw.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_291d169890a14ef892aa12b6aa71b1b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5779906-851b-4a75-9136-e6cfe1631558/canon_powershot_sx20_is_12.1mp_digital_camera.pdfIn PDF document text
    • http://lizusesujujes.rf.gd/in_on_under_next_to_between_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869640f6-450d-4d85-b477-2437f74244dc/can_you_eat_avocado_on_hcg_phase_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad65e80-6d79-49a2-a41f-7dba5e797180/xoreragipasoji.pdfIn PDF document text
    • http://gukijivire.epizy.com/31424723752.pdfIn PDF document text
    • http://vubixegigag.rf.gd/76727220876.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_ec6c38d2668140e19b7736f020dfb98a.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 2032 bytes
SHA-256: 19bdeeeca7cdbe30bebc319384cc8aa7117e7d60b838cb917346bde628177a9a
font_01_sfnt_off00013503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 4664 bytes
SHA-256: fcf6696232d547c93fb6b4dd5b76f0a7d45fad5f8604642b1c30306d48e23b72
font_02_sfnt_off000144d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D2 11376 bytes
SHA-256: 1771dea12084270b68cf7fad2cdf4272ece626a26fa595e54dd7247e91200d41
font_03_sfnt_off00016b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B99 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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