Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc89acc724088b4…

MALICIOUS

PDF

79.3 KB Created: 2021-03-25 00:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 438305f36d507b0bc7115bea3e9f7059 SHA-1: be9f2587b2c87125b46ba60ab2263c99831bb2a5 SHA-256: cdc89acc724088b4da25f30be2208367a8a271360252433d0bab133f1a52d323
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI, 'https://nipisod.ru/strik?utm_term=snapper+commercial+zero+turn+lawn+mowers', was found embedded within the document, suggesting a phishing or malware distribution attempt. The presence of multiple embedded URLs further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=snapper+commercial+zero+turn+lawn+mowers PDF link annotation
    • https://cdn.sqhk.co/peferitukofa/hihjbhj/32499656795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fd10c756764d.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/cancionero_de_palacio_partituras.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5fe977eebc348.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/30231130645.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/antihyperlipidemic_drugs.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/how_does_smart_traffic_lights_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_600f9a5850fb3.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/nerosamabulukimami.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/ohaLYjb/78412613753.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/braveheart_sheet_music_piano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5fdfb7028d68b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gulagopafed.onlinewebshop.net/banking_system_in_philippines.pdfIn PDF document text
    • http://xasejumav.onlinewebshop.net/body_parts_vocabulary_test.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f108ef-50a3-49fc-bdc6-58d2507c73d3/98905009709.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/vfs_global_portugal_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/deped_grading_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ccf833-d295-48a2-b911-0381fab76349/1995_jeep_wrangler_interior_door_panels.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/43004922232.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/skilled_occupation_list_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 5208 bytes
SHA-256: 542e303816b956786af17b2b41791bef6c4e6fea5db8326e160be8169d44c630
font_01_sfnt_off0000fc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 10992 bytes
SHA-256: 930cc832f84068626de4837270ef18813f142188c3f2447a73e1692cdfa65bae
font_02_sfnt_off0001216f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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