Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b53c1c8f2abca87…

MALICIOUS

PDF

75.8 KB Created: 2021-03-07 05:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3ca3a1012c347dae042a0beb4c7730ec SHA-1: 5e9316833fabe068baecb04df2124125638f13d1 SHA-256: 0b53c1c8f2abca872c23862df0546b37d0c64028184dad7563a65b1b3f9d88ae
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, contains text related to a movie title, likely serving as a lure to disguise the malicious intent of directing the user to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/aws?utm_term=will+there+ever+be+a+third+percy+jackson+movie PDF link annotation
    • https://cdn.sqhk.co/dejowipapoli/ZhgZigq/9341840048.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/TDnLqja/lotogukivef.pdfIn PDF document text
    • http://get3creditscores.info/salvation_army_housing_application_form190n4.pdfIn PDF document text
    • http://vilopeg.xyz/school_of_dragons_hack_2020s8vn7.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ieiavgd/nabumabigofovepik.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/jWzjhjh/galaxy_wallpaper_full_hd_iphone.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/99909622188.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/lean_organisation_management_techniques_level_2_unit_3_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ihigibr/pezikajakezenabek.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/vonuxagupeduze/coordinating_and_subordinating_conjunctions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/aida_nikolaychuk_lullaby_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/acronis_true_image_2017_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/vebopikibuzetapijapodesow.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/how_to_solve_geometry_parallel_and_perpendicular_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/plantronics_backbeat_fit_3150_in-ear_true_wireless_sport_headphones_black.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/is_firestick_better_than_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/basf_se_annual_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/formacion_de_boca_hoy_contra_river.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 5768 bytes
SHA-256: f635fa9ce92889f4511e39174c511ea0e3046a087ed1ae1317f64d9d41ecadd2
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10380 bytes
SHA-256: b4feab4aa6af8f58f1451b4e8770d108c2e2074d993f2f2fe2ea5c4a7f36ab52

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