Malicious PDF — malware analysis report

Static analysis result for SHA-256 87928f3eae81c131…

MALICIOUS

PDF

82.7 KB Created: 2021-02-16 13:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e01dd09317ebd8f0a88d2f850d17e77a SHA-1: cdb8800a7da691a0a1b2e6a125d58b85a86f6dc6 SHA-256: 87928f3eae81c13149d5ea04a85b3851df8997685d9ab59be7030b4265feb3d2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or conduct phishing activities. The document body, though heavily obfuscated, suggests a lure related to a product review, aligning with common social engineering tactics.

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://jottigo.ru/strik?utm_term=ryobi+scroll+saw+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469841/normal_5ff4d9e227db5.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/jdahegj/lajegavugagosexumo.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/jjljeFi/download_uphill_rush_water_park_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/SjdOsHD/44341741201.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/ierjgjj/all_star_ice_hockey_desktop_game_series.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/f0mSFhi/netflix_dvd_app_download_for_pc.pdfIn PDF document text
    • http://sosunimepewe.22web.org/devemes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402718/normal_6001453b86ca1.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/aEiijdl/new_gangster_crime_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/hKjbTgi/18547041502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_601ab2c57fb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_601166af8590b.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/hfuhd3z/45737084277.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/hZohaFR/fabfitfun_promo_code_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godizob.rf.gd/lotigumepubiripov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 5192 bytes
SHA-256: 9b82359fbf2e12916103b8d0f9ef9a284c23c1aa9c553e20542f84498d2bdb59
font_01_sfnt_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 11080 bytes
SHA-256: 205cd0fff3b5cb24033cba2aab851cc29049d7608cfe79629089056327a8a199

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