Malicious PDF — malware analysis report

Static analysis result for SHA-256 99685350fdb2ffac…

MALICIOUS

PDF

85.0 KB Created: 2021-03-19 15:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7b18ce0fe278e118854efe322e9ffd2 SHA-1: 0b71d9e4fa1d1c98a156842ac1ead1e1e941f279 SHA-256: 99685350fdb2ffac2339e3ea62519c7e5368944642aa7513134da76d3a38de98
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. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, appears to reference 'audi a3 price list pdf', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/award?keyword=audi+a3+price+list+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fefbea4a2986.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/Igijiev/disney_scanncut_dx_innov-_is_sdx230dx.pdfIn PDF document text
    • http://3203epworthcres.com/41726276234wh9bg.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/Rgi2gge/61597812068.pdfIn PDF document text
    • http://reduslimitaly-official.site/dantes_inferno_summaryblra8.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/hjfTqcQ/khloe_kardashian_and_tristan_thompson_relationship.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/jjFragg/jeanne_d_arc_psp_guide.pdfIn PDF document text
    • http://komarovskii.xyz/how_much_is_a_stihl_ms180_chainsawms5vl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_6049db8594d49.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
    • https://s3.amazonaws.com/dudurat/best_calorie_counter_app_uk_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/answer_me_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/67095763180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3bf364-6892-49e0-b18e-5bcf0a9d2668/yoga_mudras.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/zofefuziwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f23d07-0cca-433d-befb-0177d433d9d7/lasakuladapivofetidimufa.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/coliformes_totais_e_fecais_definio.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/27458232229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fa0b99-cf7c-45c9-811d-2643544b12b1/xupebejimezasuwapamese.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/218748971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8b86cf-301f-4918-8219-568d4e9becae/88112398976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7aa2d2-fba8-4707-8bcf-21a0fa277104/50849818092.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/suddenlink_report_outage_phone_number.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_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 4968 bytes
SHA-256: 4ca5a10f032df12cb81aa98e86ad7b423c7a62a164ba447a10df606b36c4b56f
font_01_sfnt_off00011208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 11264 bytes
SHA-256: cd388239e225152ca2429765c6f0fbf45074b6fb53ee6b7aa13c436ab925966c
font_02_sfnt_off00013819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13819 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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