Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63d9bbc5a1eac9a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 04:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c331b1a026c0e8d374e4b250c17a1c91 SHA-1: 09c1778d94595dd40d4d4d95c9f5cc4e73c3be23 SHA-256: f63d9bbc5a1eac9ad9ff96dff23b81c79542a65e8e020531edc078d7262d3bf2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=reducing+sugar+and+non+reducing+sugar+pdf PDF link annotation
    • https://cdn.sqhk.co/rawatajizefu/hgBh6gc/fadopimugigixe.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/t9idjgm/my_tamagotchi_forever_complete_photo_album.pdfIn PDF document text
    • http://dontbeshy.xyz/840489263021t5m9.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/81515583939.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/fegokibitatipuxatipeylqz0.pdfIn PDF document text
    • http://kuvubikabixol.iblogger.org/mosizaxopibimer.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/B05geZc/62499598559.pdfIn PDF document text
    • http://bestsalestoday.xyz/best_law_books_in_pakistan1rz8t.pdfIn PDF document text
    • http://vulifux.66ghz.com/vizio_m43-c1_remote_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/jbNgdYH/r-_type_final_ships.pdfIn PDF document text
    • http://gamokidawenikon.iblogger.org/how_to_fix_wifi_and_bluetooth_not_working.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/abordagem_contingencial_da_administrao.pdfIn 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
    • http://nejesezape.myartsonline.com/best_waffle_maker_to_buy_in_india.pdfIn PDF document text
    • http://bejopirobi.epizy.com/compare_and_contrast_worksheets_for_6th_grade.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/simbol_flowchart.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/chromatic_harmonica_tutor.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/how_to_update_fios_quantum_router.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/october_2018_calendar_template_with_holidays.pdfIn PDF document text
    • http://xofisoroj.rf.gd/13280550523.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/jinowiva.pdfIn PDF document text
    • http://fifusudevop.rf.gd/adidas_performance_pureboost_go_ltd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 5100 bytes
SHA-256: fe76a0f2b763f1f7689943f6e9b56a95cb216c648215bef4947b901823b5a351
font_01_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 11184 bytes
SHA-256: f627e04b0848b957f9e20720abf0772a1d39582f61bef8706a4cf9c870197d34
font_02_sfnt_off00012606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12606 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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