Malicious PDF — malware analysis report

Static analysis result for SHA-256 1252a5ecf45fb945…

MALICIOUS

PDF

83.6 KB Created: 2021-02-18 00:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7aff4f8b33de963000385cefc7703d86 SHA-1: 371fd0f2031bdd29cd24c5d1512527ff8ea67220 SHA-256: 1252a5ecf45fb945485020fdfd0a9714bc2fdfb7e320293789f0f7d367bff9a5
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable hosting and forming a link farm. The document body, though heavily obfuscated, includes a search query related to 'ggplot2', suggesting a lure to drive traffic to SEO-manipulated content. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely for phishing or ad fraud.

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://leonvi.ru/wix?keyword=adding+manual+legend+ggplot2 PDF link annotation
    • http://kigazuvunawolux.iblogger.org/16849333282.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/dhe4haA/tepatavir.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/ggdGge4/chad_wild_clay_vy_qwaint_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/giYIJhh/tewalifasawebefij.pdfIn PDF document text
    • https://cdn.sqhk.co/tubozejo/cieieno/best_barcode_price_scanner_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401559/normal_5fd700c818087.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/Hwwkjbd/epic_small_minecraft_houses.pdfIn PDF document text
    • http://revivinof.iblogger.org/87701620955.pdfIn PDF document text
    • https://cdn.sqhk.co/mobobelelu/eECjjg6/gobakefodofidizivikopu.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jgbFqA7/31842108596.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/bjeCtji/11012365825.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/3285543.pdfIn PDF document text
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/5223487.pdfIn PDF document text
    • http://kafixerutatad.iblogger.org/intellij_jasper_report.pdfIn PDF document text
    • https://punuvenow.weebly.com/uploads/1/3/4/4/134445800/jabesema.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijikabetabup.rf.gd/bible_study_faith.pdfIn PDF document text
    • http://jilerixam.epizy.com/rabenajizabiluliditejeb.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_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 5124 bytes
SHA-256: fec44118d3355b83e1aac437d746b0c1df393be12fda295b1651fcdc655fa687
font_01_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 10592 bytes
SHA-256: 97a3e4295974c1d429a5ab3bdc59bc6f321ed1929f0d3f4381f0e46197ce219f

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