Malicious PDF — malware analysis report

Static analysis result for SHA-256 f098433779aba943…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 03:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 35c18393bb8a9cee0d3f6d5e10180fb2 SHA-1: 139d1bbaa570a9fa7055d5b4d7767eee6c1c85be SHA-256: f098433779aba94368bbe51d154506d57b8a42e9132db2e4c49aaab19715af88
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a phishing lure disguised as a document template.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=letter+of+resignation+nz+template PDF link annotation
    • https://cdn.sqhk.co/sisamide/hfLjcUT/suveluzabawufaka.pdfIn PDF document text
    • http://converstarget.ru/kalender_2018_junin1a4b.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/hoCAii7/lisikanebofikasuguxizita.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/geWAhio/32076814156.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/cdNbgh1/bissell_adapt_ion_pet_cordless_vacuum_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/jgidijZ/mortal_battle_fighting_games_apk.pdfIn PDF document text
    • http://gakmancreatures.ru/mini_14_scar_stock_review370zk.pdfIn PDF document text
    • http://rebelojujiraw.iblogger.org/49833304524.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/jjNibvL/bike_wheel_size_chart_700c.pdfIn PDF document text
    • http://spoonnumberone.xyz/washington_state_university_job_fairfdfbj.pdfIn PDF document text
    • http://milky-rp.space/570933312064ohux.pdfIn PDF document text
    • http://ig-about.net/free_letter_b_sound_worksheetsusasb.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/piwanisaj/tewoxijox.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/bajaj_allianz_life_insurance_policy_withdrawal_form.pdfIn PDF document text
    • http://banidokote.epizy.com/graphing_vertex_form_quadratics.pdfIn PDF document text
    • http://doledetaxezo.epizy.com/89169755839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6a6736-3ca9-44b0-88c0-bfbca5967819/narutotuparidixedoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b682569d-6ed6-4ef0-b190-b2f6f5b21f9f/45360023412.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/99th_amendment_of_indian_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/thoracic_back_strengthening_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e39664-d788-439d-8bc8-5e91ef75377d/37222006066.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/pdf_books_free_malayalam.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_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 5212 bytes
SHA-256: 7c21970d15372ee8ed56bea09d61db4f3301651f8fdca8104af0b95a838ed599
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 10300 bytes
SHA-256: 1510086b15966a280a7a46673bcf67d95fffdd982fa8afde4bc2f257a0e834e1

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