Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4578e54cb6b7f7…

MALICIOUS

PDF

90.5 KB Created: 2021-05-12 05:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e770ab4f586e696d6561f45a13ac014 SHA-1: 71537cd8cbc8510826f9234c770f504e699f6d32 SHA-256: ea4578e54cb6b7f7239f1d656a444ea83622aca499c6ce0d827f30ea8bf5e62c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://baarspo.ru/strik?utm_term=difference+between+agile+and+scrum PDF link annotation
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://ruszaimclub.ru/foburulini6zxgv.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/6529377.pdfIn PDF document text
    • http://summ-green.fun/what_does_a_missile_technician_do_in_the_navyj59sh.pdfIn PDF document text
    • http://silver35.ru/5649972562gtaxi.pdfIn PDF document text
    • http://meweremidef.iblogger.org/firizitawidibalu.pdfIn PDF document text
    • http://shopeuro.pro/vobezebataditebetadap8t64l.pdfIn PDF document text
    • http://biomanix.best/addition_subtraction_multiplication_and_division_worksheets_for_grade_37747n.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/grade_9_math_worksheets_printablenc43m.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/fc30803cfc25f69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22ad9c9-40b3-4d7d-8718-53aa70f81838/final_fantasy_13-2_walkthrough_archylte_steppe.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_af009cbec2a6435697fc7e8b1ecb5a21.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_d2fba43c6ca94277beb9c62b8599077e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf959e1-289c-45a8-a1af-6b562655601a/casio_g_shock_watches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d043ad43-8f43-41f0-b183-881375a1fcdd/teradek_cube_600_firmware.pdfIn PDF document text
    • http://resibifamopoto.rf.gd/28741397461.pdfIn PDF document text
    • http://kiwasebax.epizy.com/decimal_addition_and_subtraction_worksheets.pdfIn PDF document text
    • http://zutoribi.rf.gd/zepemiwufojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873f5cbb-6e51-45c4-8507-bb9cd0a630c0/3183671021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd84909c-ccfb-4dcc-9bca-05e2338dfbd7/52457945927.pdfIn PDF document text
    • http://nezenomawaza.epizy.com/guia_autometrica_junio_2019.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_off00012359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12359 5572 bytes
SHA-256: 849f2863c4a8765291b79ebb713f6e27763e8462db796cca3c50307033c9194c
font_01_sfnt_off0001364f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364F 11264 bytes
SHA-256: e7b22f348d8af5b4544bfc49d6fe19f7fa3e9db0a8c8bb05a80588e9088486c0

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