Malicious PDF — malware analysis report

Static analysis result for SHA-256 6417d3248aaca3e0…

MALICIOUS

PDF

74.7 KB Created: 2021-02-10 09:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0206300ad271f8d086863aad35c9c582 SHA-1: 917f62c84c9c80e837b867ebdef17ed194ef581c SHA-256: 6417d3248aaca3e0f720f710353cb49e89220e7e1acb82b5a905eaaaa13e189f
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically targeting a search query for 'despicable me 2 wedding song' on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=despicable%20me%202%20wedding%20song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476437/normal_5ffcc71cad674.pdfIn PDF document text
    • http://cyberlife.store/anti-_hijacking_cbt_answers74e42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5ff128b127b11.pdfIn PDF document text
    • http://japancar-sib.ru/70649720075r51lk.pdfIn PDF document text
    • http://wetikufuwigiwox.iblogger.org/jakulakeputew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465263/normal_5feea6728cb14.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/hhgi8hd/drawing_ice_cream_cone_images.pdfIn PDF document text
    • http://aycotoro6.xyz/nuwugenotiq9y8a.pdfIn PDF document text
    • http://timelessdecorum.com/objective_soil_science_by_rameshjqkci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd632dbbe835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fcb6cbe2ae26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebuvikibafil.epizy.com/lagu_aku_dan_dirimu_cover_aldhi.pdfIn PDF document text
    • http://maxuzenikofi.epizy.com/86393432184.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_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5660 bytes
SHA-256: 1aabe1f4b5e7dba001f2f9ef2dad926452bf8726c37e6c91a7dc31d93dd1073e
font_01_sfnt_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 11036 bytes
SHA-256: d8c778b1a8fcccb2117546f874fa405c3f721157f7486c5d36cfa1234a7ff971

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