Malicious PDF — malware analysis report

Static analysis result for SHA-256 93363f0e9a545cce…

MALICIOUS

PDF

75.6 KB Created: 2021-03-13 14:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: da7215f644dc067bf9d279dc9cbee398 SHA-1: 26efbcf33abc7d1e436641f3faf7390d67a445ae SHA-256: 93363f0e9a545cce87ccc4ab7b42a165a5caaafd2057b34ff2663207cbb84013
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as information about cleaning a pellet stove. This URL is likely intended to host a malicious payload or lead to a phishing site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=how+to+clean+a+st+croix+pellet+stove PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd830c80a612.pdfIn PDF document text
    • https://cdn.sqhk.co/tesuvifiv/aghgcii/bitusuluf.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/icSghge/add_multiple_accounts_on_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_600bf16167512.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/iguQjgj/racing_gearbox_for_sale_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/hhBkfCG/america_s_funniest_home_videos_theme_song_lyrics.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/rusamexapiv.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/4xhahcu/15140127684.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/cgjqDji/buginezusa.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jijiiic/90996965420.pdfIn PDF document text
    • http://xobilosusi.sportsontheweb.net/electrophilic_substitution_reaction_of_pyrrole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6041c5ef1284f.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/gjidjb5/majors_offered_at_merchant_marine_academy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_600b3a93d8de2.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/mivokozibu/58759841469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c38de9-1918-4045-afb8-fbf102e85f90/bravos_xl_washer_not_working.pdfIn PDF document text
    • http://duziroro.myartsonline.com/muscles_of_the_forearm_and_hand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522664fa-f3ec-4f57-8e0d-23e740be36ab/financial_peace_university_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48830592-c4e2-4abf-9f8a-5ce0348353eb/vilovudilafejiturelitigok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/761d99df-b5c0-4a2d-a999-f6eac528ef82/modern_operations_management_theories.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/noxamemogopizuwavepafoj.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_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 5108 bytes
SHA-256: 855459a35a9cacb2f87b18c4d1731c7af1784d7dbfd5cbb37f6de83288c8918b
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 10456 bytes
SHA-256: 0df28ba076e7f4a6b7cbbb58d501c3588da0a5dffe53d2500e03bf8880b9b173

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