Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cb550dfc2719a0…

MALICIOUS

PDF

66.7 KB Created: 2020-12-01 02:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f3ea8ef5e0b48ac9a158c4713158ebbb SHA-1: 171bf63560a772b85d72ac298a032a2448b69640 SHA-256: 51cb550dfc2719a0a5cd33fa43af689fbbae783e70ea40c10956975ba0cf4b81
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 maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'forensic science history timeline project worksheet answers', likely intended to trick users into visiting the malicious 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://trafftec.ru/strik?utm_term=forensic+science+history+timeline+project+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fc4185ee555a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5f9909de8d261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5fb8482844850.pdfIn PDF document text
    • https://nonililuwadev.weebly.com/uploads/1/3/4/3/134354571/davifopaxujejizos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5f95805d46941.pdfIn PDF document text
    • https://gegiwozik.weebly.com/uploads/1/3/4/7/134719936/fosirowulofom.pdfIn PDF document text
    • https://zutafemaz.weebly.com/uploads/1/3/4/4/134478566/4643594.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/xijalovelokolep/gegatejepuruz.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/bottines_noires_quatre_boucles_cloutes_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/magruder_s_american_government_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/winrar_extractor_free_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec254724-6b57-40e4-94e6-1304d7f4ee70/kaduvowigewar.pdfIn PDF document text
    • https://s3.amazonaws.com/rijedifatufod/unblocked_games_76_weebly_run.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/gibiwepop.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_off0000c88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88E 5464 bytes
SHA-256: 1f449753b9b415f97b617fd0738299034296e3d759c930b0f68442a0e409c9b5
font_01_sfnt_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 10200 bytes
SHA-256: 0f9c60fe12b8c1103259754483bc826ce31b7e88c73691ec3f962265c230f5f9

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