Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ae85ec45aef4ce…

MALICIOUS

PDF

75.1 KB Created: 2021-02-11 22:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 63b28d4e6b2cc33cb61e5cd28d5769ef SHA-1: 3fc771c726a53434ef282ae8170249a85e905923 SHA-256: d6ae85ec45aef4cebc6db060089b3e0a9c5049718a8a663d4fd7d8ec8167f36c
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to malicious 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://leonvi.ru/wix?keyword=bleach+vs+naruto+unblocked+games+6969 PDF link annotation
    • http://basiditdcf.space/dorunun_analitik_incelenmesi_zml3uff7.pdfIn PDF document text
    • http://hargotel.xyz/420315302836k28h.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/0da7ef6.pdfIn PDF document text
    • https://nojesinas.weebly.com/uploads/1/3/0/9/130969722/tikidozefevuli-didipubux-mofejevisipev-zifewu.pdfIn PDF document text
    • https://pelazokud.weebly.com/uploads/1/3/0/7/130775509/jevagekixiked.pdfIn PDF document text
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/d54877665cce32c.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/79d3ca27f.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/50937.pdfIn PDF document text
    • http://jakor.pro/flemingsburg_ky_stockyard_market_report2w39b.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/kiwoduj_kimemebavutu_redasamawemedof.pdfIn PDF document text
    • http://profapp.pro/zarareza628z.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/sowudatopakowutop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dudasuz.epizy.com/volijirabegoxikujujolanam.pdfIn PDF document text
    • http://firotiz.epizy.com/japubapakinij.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 5976 bytes
SHA-256: 9788a08fde7f4bf63814f57b17182a2a62a32f0626d1248f88c1c234414ca380
font_01_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 11140 bytes
SHA-256: b95cee0ad149ed25827b1fdca4e91db149e7555336305aee17fa2a82a6fdf216

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