Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf420044d9a93c1…

MALICIOUS

PDF

57.8 KB Created: 2020-12-22 04:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1989931b0e6a7d1170ad171b0a4e6934 SHA-1: 1400919df66e99eae0aba759b66dc9c460d9ca7e SHA-256: 1bf420044d9a93c14520da479acbe067437aaef7369222abadd70c54cd458e1f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'pink lava lamp', which is a common tactic for phishing or scam attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=pink+lava+lamp
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fc20142d9be5.pdf
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f9c26671bc2e.pdf
    • https://faxosuxen.weebly.com/uploads/1/3/4/3/134342902/zokogumilika-sidofudekuzi-nuzir-sokinenetipop.pdf
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f9039538efc5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bab86f46-2710-4574-a878-265bc6551885/junonoresajir.pdf
    • https://static1.squarespace.com/static/5fc2a873e5c7695ca9a6fc9e/t/5fd1f9938ba64b78df59de8e/1607596436247/surerasiluladawigida.pdf
    • https://s3.amazonaws.com/wekibik/18384325338.pdf
    • https://uploads.strikinglycdn.com/files/43ea2cb6-99f7-4589-a4f2-a5fb59fa1c0a/what_happened_to_jill_on_mom.pdf
    • https://s3.amazonaws.com/povodijirig/amazon_stock_performance_2017.pdf
    • https://uploads.strikinglycdn.com/files/bea70863-6ecc-45ce-9b30-af67e68f15e1/chessmaster_grandmaster_edition_down.pdf
    • https://uploads.strikinglycdn.com/files/26b94ce1-6c56-4a06-b6fd-d23c08271015/86182349887.pdf
    • https://static1.squarespace.com/static/5fce397f4e85dd6b25168a85/t/5fd21bddfec2791e310ed280/1607605216502/ferof.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a904.bin
0c1897b5cd9cf6f46143009a9e913817621e1b2f1b992e1f1ffaa546a54b0df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA904 4816 bytes
font_01_sfnt_off0000b960.bin
4123b3ab80970fc993293d1db6e3d4149001cd5b45a5ac1a96952b5f3e78a3d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB960 9504 bytes

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