Malicious PDF — malware analysis report

Static analysis result for SHA-256 910e625d1c40bc7c…

MALICIOUS

PDF

89.7 KB Created: 2021-04-07 20:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7882b1c4116f0fe5e316dc554fddea65 SHA-1: 29727d4f28a6af642b932858f40ca12d8e5a2ae9 SHA-256: 910e625d1c40bc7ced121d975fe12c57d151eb21154f64ba07260fc367d83c21
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'Caterpillar 3412 generator manual'. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely for phishing or to serve a secondary payload.

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://ponafet.ru/123?utm_term=caterpillar+3412+generator+manual PDF link annotation
    • http://naligixe.getenjoyment.net/bruce_lee_fighting_method_volume_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_60411b7240b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466386/normal_605c593b21775.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/el_aprendiz_del_brujo_pnl.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/murudute/42814549146.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/31317156508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77db198-7c2b-4627-98d1-804aeb823e2f/zowineji.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/item_analysis_template_for_grade_5.pdfIn PDF document text
    • http://pumikowexudat.onlinewebshop.net/7983413200.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/jomerajoladev.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/nedira.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/airport_express_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc41c26-3296-4334-9308-328b393b6367/dofisamarosubuvurojad.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/guitar_amp_tuning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/guideposts_mornings_with_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/sb_800_speedlight.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/watsons_go_to_birmingham_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/attestation_de_loyer_caf_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59810311-efa3-480e-a78e-73f517a9a68a/fajosunizis.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/causes_of_food_adulteration.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_off00011dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD6 5300 bytes
SHA-256: 1251532834af60c080e32b0440437bc74dabd28a67786727e0551d3080119753
font_01_sfnt_off00012fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD7 12280 bytes
SHA-256: 9f2d5a7b584f0d7c012144dfb03fe2187d7cc33e55f27a4fb562f40a3bf663df

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