Malicious PDF — malware analysis report

Static analysis result for SHA-256 601b98c4f23108ef…

MALICIOUS

PDF

72.5 KB Created: 2021-01-15 06:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a3f2cdfdcb4931ec025af6e9fe5944 SHA-1: d28f5f6b6b5719cdd783a3e8f17889f21bb37e81 SHA-256: 601b98c4f23108ef987a1c3c3f90802551311e4eeb2ee9424466452a975850b2
184 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'Aladdin song audio' and 'wkhtmltopdf', suggesting a lure or exploit. The numerous embedded URLs point to a link farm designed to redirect users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=aladdin+song++audio
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/6166776.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/216731f9ea.pdf
    • https://cdn.sqhk.co/lewivapawo/fgelhyZ/zisogu.pdf
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fcd41de8c22e.pdf
    • https://site-1168003.mozfiles.com/files/1168003/5177298090.pdf
    • https://site-1176298.mozfiles.com/files/1176298/53452417579.pdf
    • https://cdn.sqhk.co/medukukekuke/7m0ehd6/to_do_list_app_microsoft.pdf
    • https://cdn.sqhk.co/lipetebo/eshaCjg/4517021974.pdf
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/somemuxubenin.pdf
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f970a1fa637a.pdf
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8d08e698724.pdf
    • https://cdn-cms.f-static.net/uploads/4453336/normal_5fbbcc5015fe7.pdf
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/9850514.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000df02.bin
e1c30607aeb1f9d30d688cbc29b01689e45c72bb04506432027e59f81c26a732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 4884 bytes
font_01_sfnt_off0000efb5.bin
c0c0ef255a5d930c3cb5c1a10ed11b1c4cbd3a50026af4dfaf727ca613ebe78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 11124 bytes

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