Malicious PDF — malware analysis report

Static analysis result for SHA-256 77df1f5b3db34fe6…

MALICIOUS

PDF

114.5 KB Created: 2021-03-14 00:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24c70ff2e077fd5b531b06b5c86b09b SHA-1: b7ef6f73e9ee7f28bda317d5e947fbf94912d8bb SHA-256: 77df1f5b3db34fe6ba77f8964fb0197df1652c3f8102ed66507f903bd27f6220
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics search engine results, likely to trick users into visiting a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

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://seumenha.ru/wix?keyword=robert+kennedy+assassination+apush
    • https://cdn-cms.f-static.net/uploads/4383679/normal_602f2ba335fcd.pdf
    • http://alex-chekalev.com/72422975972los4v.pdf
    • http://sehq.xyz/zimabidewafonedepuzy3t3m.pdf
    • https://cdn-cms.f-static.net/uploads/4426415/normal_603479597508c.pdf
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5fd2eb386a33a.pdf
    • http://sejixuwitu.22web.org/dutum.pdf
    • http://itash.space/360988835519tiy0.pdf
    • http://samoe-samaya.ru/77776873509efy2z.pdf
    • http://look-hotel.com/388732286486ykn.pdf
    • http://cmbespaceclient.xyz/56985181557q66qc.pdf
    • http://tikovg.xyz/best_buy_undercounter_refrigeratoryxvll.pdf
    • http://thelait.pro/kitchenaid_kcm1202ob_replacement_carafedqr8v.pdf
    • http://brumbum6.xyz/wugevolixf47.pdf
    • http://cocobuka3.xyz/43404811914jdw9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wafubarig.epizy.com/texiwakaxewirusem.pdf
    • http://sulijugofogim.onlinewebshop.net/14198996466.pdf
    • http://jadivepijuga.myartsonline.com/68429318653.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000171e6.bin
e58bc9dcc0d0bd5c45a9aa32b68fd7a80c76f55d79eff4c1c676734018d309fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171E6 5212 bytes
font_01_sfnt_off0001838b.bin
c4e8be147c68d779009ff77368911573cc892b619a3b7b777fb2574e1e98ca1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1838B 12172 bytes
font_02_sfnt_off0001ac74.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC74 4324 bytes

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