Malicious PDF — malware analysis report

Static analysis result for SHA-256 39082c78f212e2d6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-27 09:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00f1d66f1216a9df25f9a3a01c0e6470 SHA-1: 0a9b09afb69e26e397181034fec700c994252dfe SHA-256: 39082c78f212e2d633c0a87a12699ab5da1c899a7056e510d3acb5a30b1a8aaf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL suggesting a phishing lure related to PDF watermarking. ClamAV detection and ML classification strongly indicate malicious intent. The presence of external URIs and link farm heuristics further support a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=add+watermark+to+pdf+adobe+reader+mac PDF link annotation
    • http://resimpub.com/wonemakowuvavivepbch.pdfIn PDF document text
    • http://politach.com/d_and_d_delights_menu_generator2whi9.pdfIn PDF document text
    • http://satibudax.22web.org/9981632131.pdfIn PDF document text
    • http://storeplus.pro/75881141628n2jxl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_b03c4680c8014c91b51cfff8ed484dc7.pdf?index=trueIn PDF document text
    • http://gefelabofine.rf.gd/bozodunetomodaw.pdfIn PDF document text
    • http://lozepis.epizy.com/komplikasi_asma_pada_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/glory_to_hong_kong_piano_music_sheet.pdfIn PDF document text
    • http://kibozeriso.epizy.com/rivukokitupazu.pdfIn PDF document text
    • http://mobutomamalu.rf.gd/how_to_write_a_movie_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/gukidexajanepusezodetagab.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_80112005706145afa997d8d482f29a0c.pdf?index=trueIn PDF document text
    • http://nozafawuronixe.epizy.com/udemy_er_for_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/normal_weight_loss_after_gastric_sleeve.pdfIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_e229263f422e451eaa463f42450bd492.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9bad8a-609b-4df5-a559-c0406081c826/65421653646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8b0c30-c3af-4052-9f75-57b6d7e76c2f/modelo_contrato_de_arrendamiento_local_comercial_colombia_2019.pdfIn PDF document text
    • http://maviwapas.epizy.com/bike_racing_3d_hack.pdfIn PDF document text
    • http://dulefuzobov.rf.gd/admin_html_template_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 5376 bytes
SHA-256: 7e95c2aa4b6cfaeb99d1647c6a1904d3fec7685e17bc7b836e6d1f40645d28f7
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 10592 bytes
SHA-256: 46ef9a5c749d39e3b4cbe52317fdb6fcd1cac0f9bf30202ab8fa71d98c93a139
font_02_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 16616 bytes
SHA-256: 1b2ba628f786a6a53a2e347e0c4424ff2728452c1f162074ac3e64c6542c501c

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