Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7dc644bf34252b…

MALICIOUS

PDF

68.1 KB Created: 2021-03-20 21:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9576d7feb4bd3b43d7cb26e30960aacb SHA-1: ea0e9b27e0a3bb335cb0dff9e2e86150646065b4 SHA-256: ba7dc644bf34252b58f4c2acf41664b5ac35806cb0fd5eb365445bb4e3bfc0d2
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to redirect the user to a malicious site.

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://midufefew.ru/aws?utm_term=a+long+straight+wire+carries+a+current+i+along+the+positive+y+axis
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5fdd97857412c.pdf
    • https://static.s123-cdn-static.com/uploads/4481158/normal_5fff50bf6cbcc.pdf
    • http://mudikovarew.mygamesonline.org/tafafakim.pdf
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5fe02ea08f298.pdf
    • http://xariketixagat.mypressonline.com/shirley_jackson_the_lottery_interpretation.pdf
    • http://tulavesew.getenjoyment.net/roman_catholicism_loraine_boettner.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juvosi/domapudi.pdf
    • http://zekezixurul.onlinewebshop.net/pdf_watermark_remover_open_source.pdf
    • http://gipebevu.atwebpages.com/one_thousand_and_one_nights_movie_cast.pdf
    • https://s3.amazonaws.com/pisedij/zezemeboxefamuw.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_70f3e3e92ce94ac2b583b99c74ba30bb.pdf?index=true
    • http://fomepufasele.atwebpages.com/38382933305.pdf
    • http://zibelasavu.atwebpages.com/how_do_i_invest_in_a_money_market_fund.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_015ec75bfae04144a5ecb15d9d7a3d97.pdf?index=true
    • http://boxijekew.atwebpages.com/how_often_do_you_get_paid_at_dollar_tree.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_off0000c979.bin
d3ad576c2d1687b8460c81653519aadc4ef4720e64a4613e79c725c1ad26bc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 5508 bytes
font_01_sfnt_off0000dc50.bin
738b4f9f2acf29f73001dfe09baa9c3928d0364bcbcada5f9a141edc8090d106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 11520 bytes

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