Malicious PDF — malware analysis report

Static analysis result for SHA-256 af55d8d2c0d2c7f9…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 03:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b9c28f41d49e2184e336c1fb025c0fb SHA-1: e84d527eeae208a282affff4919971e5ad18537c SHA-256: af55d8d2c0d2c7f9b02a9d1fb56093ef59e80c1b945061ac4138c8be84eccdf5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for printer maintenance instructions. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. The presence of multiple external URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/aws?utm_term=hp+laserjet+4200+maintenance+kit+instructions
    • http://jefaritixe.22web.org/shutterstock_free_images_website.pdf
    • https://cdn-cms.f-static.net/uploads/4366036/normal_6033a9aa7de10.pdf
    • http://godulonu.22web.org/watch_the_original_pippi_longstocking_movie.pdf
    • http://bowoporoj.iblogger.org/gowobakakanifaniwebata.pdf
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5fcd51390dcdb.pdf
    • https://static.s123-cdn-static.com/uploads/4479433/normal_5fec47aa430da.pdf
    • https://jolidezebixisu.weebly.com/uploads/1/3/3/9/133997790/1341491.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5fe765c8c0d3c.pdf
    • https://cdn.sqhk.co/gulanuwe/ggjPUa3/basketball_stars_perfect_shot_hack_ios.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://biborufa.epizy.com/sivemexowotomiripanubaji.pdf
    • http://bumojomoso.rf.gd/10015649328.pdf
    • http://sobogasitizi.epizy.com/galacticraft_rocket_guide.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_off0000e11b.bin
00985119326b9e07143a7b184620feec36cabea306267667c019d34bfe40eb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE11B 5544 bytes
font_01_sfnt_off0000f3e6.bin
29eb7283179aa80518b3b949e54e1c180638ebc3c7c7f4563b0b9dce86f703e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10364 bytes

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