Malicious PDF — malware analysis report

Static analysis result for SHA-256 540105b0a5a74fee…

MALICIOUS

PDF

84.4 KB Created: 2021-01-26 08:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 47599d29d7bb3dfbe1f6b5a191ba4bb9 SHA-1: 9f335aa2743721562e0f930cb18985c52733a876 SHA-256: 540105b0a5a74feefcf0e8646b02588855804fef22d706be9128e20145d1b438
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The embedded links, such as 'https://leonvi.ru/123?utm_term=gw2+gearing+guide+2017', are designed to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm on disposable hosting, reinforcing the malicious intent.

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/123?utm_term=gw2+gearing+guide+2017 PDF link annotation
    • http://shoop-fn.ru/retro_9_racer_blue_outfitrg9s2.pdfIn PDF document text
    • https://sewimoranekodov.weebly.com/uploads/1/3/0/9/130969375/a1fb14beba7c7cb.pdfIn PDF document text
    • https://nibonitet.weebly.com/uploads/1/3/0/7/130776737/topusezozivusadu.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/e94e89130b370.pdfIn PDF document text
    • https://boxusuvibirux.weebly.com/uploads/1/3/5/3/135308560/pewon.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/suxizasejo.pdfIn PDF document text
    • https://bopisigo.weebly.com/uploads/1/3/1/4/131453919/127448.pdfIn PDF document text
    • http://hytri.com/downloader_for_instagram_pro_apkjkpaz.pdfIn PDF document text
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/43163918c8bc9d.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/1033300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/62251290555.pdfIn PDF document text
    • http://wawutanow.epizy.com/1253734042.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/wezavekov.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/muzonawamo.pdfIn PDF document text
    • http://bomesesif.epizy.com/vojizifamebuvid.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_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 5312 bytes
SHA-256: b2dac5121b8b3b9faac7804715ff5311643c6989c2dacb5c404322caa98f44e5
font_01_sfnt_off00011f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F09 11060 bytes
SHA-256: 919e17240e3f199f2fcfa6eaa25922fc310da12644f648266e4a776bd2059d83

Open this report in the interactive analyzer, or submit your own file for analysis.