Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4cfd5b8da58737…

MALICIOUS

PDF

94.1 KB Created: 2021-03-15 09:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6fdc736dab0ebe08ab5b3491a6595873 SHA-1: 5a56e1e02f6e7288530fb671d1f04e0a02a85eff SHA-256: 8e4cfd5b8da58737b7e869f180bf65511f0dfa5b1f670c8cc5c3f83b2189ba5e
126 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 a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this conclusion. No scripts were extracted, but the overall structure points to a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=elemental+weapon+5e+dnd PDF link annotation
    • https://cdn.sqhk.co/vigasigetogi/5digic2/robot_car_transform_2020_robot_wars_2018.pdfIn PDF document text
    • http://politach.com/hp_pavilion_dv6000_wifi_not_workingxwm3o.pdfIn PDF document text
    • http://teguruta.medianewsonline.com/action_research_methodology_in_education.pdfIn PDF document text
    • http://airned.ru/5345849954937yft.pdfIn PDF document text
    • http://micrometerdigital.xyz/how_many_calories_are_in_a_jersey_mikes_veggie_subsap4z.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jCyBjgF/ceramic_art_tile_shops_osborne_park.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/what_is_a_goblin_in_the_hobbit.pdfIn PDF document text
    • http://jokagijizuxuxo.22web.org/haier_washer_dryer_combo_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/fAihSgj/wemobizinilu.pdfIn PDF document text
    • http://vvinorama.fun/zujulefawigagafibaqboet.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/hfjhb9h/hillsong_worship_songs_youtube_with_lyrics.pdfIn PDF document text
    • http://gromstroy.com/7155387269483t27.pdfIn PDF document text
    • http://itawegan.fun/pojixeziduzejimoxilozapatztr.pdfIn PDF document text
    • http://pitushok.space/475_tax_deductions_for_home-based_business515v3.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/gjbyojh/vudojasarekunabumag.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/cijPGzL/u_mobile_center_johor_bahru_contact.pdfIn PDF document text
    • http://ig-about.net/how_to_cancel_alarm_on_bose_wave_music_system1ne6x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tutonewi.epizy.com/convert_to_ms_word_doc_online.pdfIn PDF document text
    • http://fobukisa.rf.gd/amore_liquido_bauman.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_off00013540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13540 5004 bytes
SHA-256: c450e981427787fb38127118b0b2e6d6318cbf54dee47e03a646811cd65175aa
font_01_sfnt_off0001464a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464A 10780 bytes
SHA-256: 0ab9a74cb022d4462131fb11b7aebe4b9a3b761ca2c5fd3c7677c3d233fc7d9a

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