Malicious PDF — malware analysis report

Static analysis result for SHA-256 633e9b32a101de6e…

MALICIOUS

PDF

73.0 KB Created: 2021-02-23 02:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 899b4de28b51477465a8581eb0ef4d16 SHA-1: fde953ad92d6e0e2fa5b9f34a882ee7c62d91bd8 SHA-256: 633e9b32a101de6e71f6df6603013dda78e8eb9e650262923234164bfdbf5db4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm. One of the primary URLs, 'https://bologen.ru/wix?keyword=gunvault+sv500+manual', suggests a potential lure or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=gunvault+sv500+manual PDF link annotation
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/9835a.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/eFxiege/beat_cop_marvel_champions.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/Qicigif/bluffton_weather_forecast_hourly.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/FViarcm/my_tv_games_deluxe_golden_tee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_602e6242a4a4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503390/normal_60076dbb58216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5ffd52de9df3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pidufozu/driving_school_2017_apk_android_1.pdfIn PDF document text
    • http://vutakeba.epizy.com/dadorivijororobam.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/66862437255.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/impulse_response_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/35485839697.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/raduvapagiperezi.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/lobexegowusixirif.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_off0000d696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD696 5092 bytes
SHA-256: 58f31b57286cfe9aa574ab114ac571203ab10ccb7e69675f00d4456b8c6a5d56
font_01_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 14832 bytes
SHA-256: ae34d26ea30f426ae88a7ab409864809868c005313fc53c24ec5d6465e4fe0f0

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