Malicious PDF — malware analysis report

Static analysis result for SHA-256 36827a6a47ef32de…

MALICIOUS

PDF

76.9 KB Created: 2021-04-18 14:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b6e5da2ece27012adc08ef3bd58ee28 SHA-1: 84270cca7d9e3386e4d51e6230e34f34db4e16c7 SHA-256: 36827a6a47ef32de087f74806316f33b7bc0df14e972dc870b8ee7d950ea24cd
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 0.9991

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://nipisod.ru/strik?utm_term=how+to+check+power+steering+fluid+honda+civic+2013 PDF link annotation
    • http://lovapezelewog.iblogger.org/codycross_answers_group_29_puzzle_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5fe1f34aee05e.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/basic_english_grammar_exercises_with_answers.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/how_long_have_prisons_been_around_uk.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/raviwozonosujedipabubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467005/normal_5fd3c613577c0.pdfIn PDF document text
    • http://bositozibab.getenjoyment.net/xiwemexabitiku.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/gutikedobujixusukijivujod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_6069d0326e0e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5ffb52dbbb215.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/80530683259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6010d380253bf.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/dejumawajijeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowopiri.rf.gd/place_and_manner_of_articulation_of_english_consonants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a83a16d-83c6-4811-917c-24c28ff1c946/una_vida_con_proposito_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cfa39a7-ad0a-47f8-a9e4-4522325ad6d1/miller_thunderbolt_225_150_ac_dc_stick_welder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd56bab0-9897-40ac-a501-f3bd88d83b46/pharmacy_technician_calculations_practice_problems.pdfIn PDF document text
    • http://risubutiz.rf.gd/telling_time_in_spanish_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a16d07-e8ac-4aa1-96cb-cfa776cb215d/craftsman_garage_door_keypad_315_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a7bcb9-a260-43ad-8e29-446d9868a7d6/restatement_second_of_torts_section_46_cmt._d_1965.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/thinking_out_loud_guitar_chords_and_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec352fe-853c-4d67-aee7-b672dc27939d/78762592193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c56028-ea1b-4153-a65b-d9e349a96ac4/google_chrome_flash_player_alternative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b03308-172b-4db8-955e-6cdd61b4e2c4/prayer_of_jabez_book_sales.pdfIn PDF document text
    • http://xerotoxivedeme.epizy.com/juvuxefoti.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_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 6084 bytes
SHA-256: 582f7b34530feec5f55e15f846d8ab9ba04cdffae1a02b774889a498354e4fc2
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10204 bytes
SHA-256: 2d3857424cffb927514c3825652cc0f36b56fe216896ff2c12c058dec738cfe9