Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8f7dcf47c77445…

MALICIOUS

PDF

70.6 KB Created: 2021-01-29 12:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 34a37ba09af207ff3de22083b9dd178a SHA-1: 8fdc2a7e4166c73fb2f64b4210c6531ff967cb92 SHA-256: 5a8f7dcf47c7744541eed9b1d750b103eefebd76071790bd0b4efdd82e986745
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://maypoin.ru/wb?keyword=where%20can%20i%20buy%20archie%20comics%20near%20me', which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a search query context, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=where%20can%20i%20buy%20archie%20comics%20near%20me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddb8f6e7696.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452607/normal_6007ea6b75f9c.pdfIn PDF document text
    • http://kufigada.22web.org/50558421042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fdc56d219f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fdac068d4e34.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/hdgihzJ/facebook_marketplace_local_pickup_only.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/zasepo/marksheet_verification_nic.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/sosugir.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/bafg_antrag_formblatt_3_zeile_12.pdfIn PDF document text
    • http://giwokekurodi.rf.gd/cydia_ios_7._1_2_no_computer.pdfIn PDF document text
    • http://bobupugarini.epizy.com/ping_anser_putter_value_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/blessing_laura_story_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/ciencias_sociales_primaria.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_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 5264 bytes
SHA-256: 2a24d24318c8a9cb9e61d201f9a48b509a878bc55ceb91575033a30bd461be62
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 11348 bytes
SHA-256: 22a4e6330c6cf3603fa55ddaf655bd138f325a134bf2377a4e2821523b9d9ce9

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