Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d14198f36175e0c…

MALICIOUS

PDF

75.5 KB Created: 2021-03-02 18:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3590c7d87d2040104d828e14b7a2a294 SHA-1: a44baf9703124df99142a502466304fd3708ff98 SHA-256: 8d14198f36175e0c746308cc4cc3d2fb8f3434bf3897636ba2de1fb6fd8ff413
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or link-farm-like infrastructure, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'demi permanent color' and application information, likely a lure to disguise the malicious intent.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=how%20often%20to%20use%20demi%20permanent%20color PDF link annotation
    • https://cdn.sqhk.co/rijakobebux/ibhg2gi/nedilixuxapowixibamewew.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/tikedobimamifisifa.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/2932876056.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/ghdsuNx/sustainable_development_goals_sdg_indicators_malaysia_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_602ebf3ec1774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5ffb90794b092.pdfIn PDF document text
    • http://constructionhouse.info/290564865767wv7b.pdfIn PDF document text
    • http://iciapp.xyz/ansar_sheikh_marksheet_upscnv3xx.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/2283176.pdfIn PDF document text
    • http://zerkalo-fugicar.website/fibixenotisixapenevuemekm.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/je6WZid/bopibut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaloruligot.onlinewebshop.net/zixugivijopafemubilo.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/kenmore_front_load_washer_wont_drain.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5356 bytes
SHA-256: da9893956db77c963614174c29e64c2a72570fd79155614d8e1acdb6a8d92f0b
font_02_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10616 bytes
SHA-256: 1a0ebe049c7f18a5b41732a654e8dc0b63483a739b4aaf6a17e9e6c878a5e71d

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