Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8b5b066f5cfa77…

MALICIOUS

PDF

75.4 KB Created: 2021-03-22 05:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2185247ca00d0eca76959b9d415bfd79 SHA-1: a01ae9f25cf290c1d5dd46325af9d1061a3000a2 SHA-256: 2a8b5b066f5cfa772b14c613c74bc317f2837489d76adfda71011ef3b7167a35
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though garbled, suggests a lure related to a synonym list.

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://midufefew.ru/award?keyword=synonyms+antonyms+and+homonyms+list+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366011/normal_60509b639a6b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fdc54351ab7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_601d0db86e7a1.pdfIn PDF document text
    • http://naturebiolog.fun/aluminum_extrusion_design_manualdeyjd.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/t3jjD8X/bubble_shooter_with_friends_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474471/normal_5feafbe56e9b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_60493e6623264.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/iagdjeO/blooming_flowers_merge_flowers_idle_game.pdfIn PDF document text
    • http://com-signto6.xyz/654955289513hof1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465003/normal_5fcb521800484.pdfIn PDF document text
    • http://blockingscenery.com/31047652529uvz9k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_6042c6961132d.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/wenobagupexekap/69732746243.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/online_bookstore_website_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/drug_trafficking_in_colombia_report.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/sustainability_report_bca_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/android_7._1_factory_reset_password.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/pogawuginivu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/67088718841.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/live_nettv_apk_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/cambridge_dictionary_offline_free_for_android.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_off0000e838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 5388 bytes
SHA-256: 0cbcf28ec0f3c02ecee019fb757eb362fcfad8135ed5df79bb5baf3444043cdf
font_01_sfnt_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 11164 bytes
SHA-256: d601ea9859a77031803397fb3141ab337fdcf54d083933be07be9b4368e095b3

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