Malicious PDF — malware analysis report

Static analysis result for SHA-256 e233a7b9960e3d9a…

MALICIOUS

PDF

81.0 KB Created: 2021-03-18 04:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed9d78b9ea0b51334c29ebe5a428a08 SHA-1: 813717a6b5f50f1693e2539a333a7cbd7b237a4e SHA-256: e233a7b9960e3d9a26f35809af7395eef7d88ee4323bd2860df9b98b461d4c7c
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body is heavily obfuscated, but the presence of the external URI suggests a phishing or credential harvesting attempt.

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/wix?keyword=north+canton+youth+lacrosse
    • https://cdn-cms.f-static.net/uploads/4380523/normal_605273dd0a1f8.pdf
    • http://lovupijuti.getenjoyment.net/satixevazex.pdf
    • http://kunabote.22web.org/82709098142.pdf
    • http://fobativ.mywebcommunity.org/mirasobudog.pdf
    • http://ruguwafe.scienceontheweb.net/is_it_ok_to_pour_concrete_in_freezing_weather.pdf
    • https://static.s123-cdn-static.com/uploads/4368991/normal_5fe028062ae7c.pdf
    • http://maykistore.ru/sat_practice_test_2ma1gk.pdf
    • http://kimiter.medianewsonline.com/13474635628.pdf
    • http://nopuvobetag.mygamesonline.org/bagisisurelarivobu.pdf
    • http://nuloriwilorij.scienceontheweb.net/97105954180.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fdc122e8c86f.pdf
    • http://sumapewub.getenjoyment.net/podirilizusexawuzu.pdf
    • http://grantmedica.ru/vajiniwomudefazomiysi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://murawarex.rf.gd/38750633515.pdf
    • http://pipizupife.epizy.com/ganesh_ji_aarti_lyrics.pdf
    • http://nivuzujanux.myartsonline.com/garod.pdf
    • https://s3.amazonaws.com/gateme/30522279232.pdf
    • http://naremijex.epizy.com/wopenadimiwigaropufin.pdf
    • https://s3.amazonaws.com/biwuwukesazef/filmy_bollywood_movies_2018.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_off0000fa23.bin
7fe3c6787da844176e7aa0656d148ac3461d543ad6d2743fb94bc63ba6963bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 4956 bytes
font_01_sfnt_off00010b05.bin
f5ae9bb196d883a6b5579d1866c7ab65048b9392c7aadd5e3b0ffcc71eaf78e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 12896 bytes

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