Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98fa0bb777098b…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 12:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 28c4b8894855b34dd3eed3d77a6ccfb4 SHA-1: 5b267e5990aab7e4918068821a30a8b0cf11d851 SHA-256: be98fa0bb777098b574f8588385f9aa436b72701bb99a0305b2d01d973660bff
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to mimic search result snippets, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://botokaw.ru/wix?keyword=essentials+of+international+relations+6th+edition+pdf PDF link annotation
    • http://mirijesuwakug.sportsontheweb.net/is_per_capita_income_gross_or_net.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/tEHhbpK/draw_joust_apk.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/cuestionario_de_los_cinco_lenguajes_del_amor.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/98707170796.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/8350114197.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/f3gfihZ/golden_globe_ratings_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/Ujjgege/drag_racing_light_tree_for_sale.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/c1a9276fd47ae.pdfIn PDF document text
    • https://koramuxojenaxer.weebly.com/uploads/1/3/4/7/134701110/rumiwekuzupivanurowa.pdfIn PDF document text
    • https://cdn.sqhk.co/mazonixun/jiLxUie/35906005378.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/kewijadun-piwirovufivonaj-ronubisexudox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tinipukax.epizy.com/48057842277.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_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 5240 bytes
SHA-256: 7c0d3cccd00f488f2039ce31daca46a7a257de94123faee96351245e35efa4a1
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 10184 bytes
SHA-256: 5c9eef634c83826c2ca8a118a1edccc69a2be2b23aec61bd3864edf0dc590773

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