Malicious PDF — malware analysis report

Static analysis result for SHA-256 961fb1eab696fcd2…

MALICIOUS

PDF

68.1 KB Created: 2021-02-16 03:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26771a355b76b8af51f46f66bf49146c SHA-1: 4e506895c49448b3ba38e812b576a11d188c3cc2 SHA-256: 961fb1eab696fcd257b6e9cdfe028bb167091f8bd0d9d1c01fc1d29bb33e1e74
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text related to a 'Spongebob bowling ball game' and metadata from wkhtmltopdf, suggesting a lure. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution point.

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://druttle.ru/wix?keyword=spongebob+bowling+ball+game
    • https://cdn-cms.f-static.net/uploads/4424682/normal_601de9de26c5a.pdf
    • http://cmbespaceclient.xyz/41850756308tpoqa.pdf
    • http://reduslim-italiaoficial.site/android_forum_ukne6a0.pdf
    • http://boomua.site/adding_subtracting_negative_positive_numbers_worksheetvu2as.pdf
    • https://cdn-cms.f-static.net/uploads/4425217/normal_602879a74264e.pdf
    • https://cdn.sqhk.co/xoxifopu/mTibFAW/ice_cream_cake_delivery_malaysia.pdf
    • http://ompala.store/online_to_autocad_converter_free_download_with_crack5fmw7.pdf
    • https://cdn.sqhk.co/jolodovi/gXYNshh/97272756701.pdf
    • http://idealica-italy.site/72074186224lyjg4.pdf
    • http://stixlife.info/kapizot5lv.pdf
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5ff15bed2fba0.pdf
    • http://qunit.space/zalapesiv7t8io.pdf
    • http://digtalcaliper09.xyz/samsung_un32eh5300_manualtqefe.pdf
    • http://cuzinfo.ru/historia_del_mundo_contemporaneo_1_bachillerato_santillana10mg3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vatakefojunib/datajusip.pdf
    • https://s3.amazonaws.com/pozokimepe/mifadi.pdf
    • https://s3.amazonaws.com/gurafoga/dovorejunedutebugizajixo.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_off0000d0a2.bin
da8f3f4218cf743fb4c3166bbba267107fb36622d1d90a4012439a5bad6790b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 5200 bytes
font_01_sfnt_off0000e254.bin
baeac4d32257fc97b2fef1d671123787ea2d50cc2538de400bc02b6f205001b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 9760 bytes

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