Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eca53d8b8f6c828…

MALICIOUS

PDF

70.1 KB Created: 2021-02-15 14:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 869922d44d66392b0109643e4017b9c4 SHA-1: a971df24097b548db930f28a82f9be1f383c78ed SHA-256: 8eca53d8b8f6c8282aa26f2a4896a3f64ff4bbc742711bdc18b5680c6f06327f
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=the+rules+of+attraction+full+movie+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390681/normal_6003b52a2b050.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/bSichfo/93123844780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_60174f8d44e49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405419/normal_5fc7c372b8374.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/6b335db5a576a.pdfIn PDF document text
    • http://pearhaidhr.fun/beyond_the_clouds_movie_songs_free96ev2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fff06a077a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470841/normal_60184f29ec771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_5fdc4f2411235.pdfIn PDF document text
    • http://surogufepisim.iblogger.org/99365184741.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/6821493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_601a0f6120a58.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/5775139.pdfIn PDF document text
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/kibenupejamefak-luwinuna-gaxuzoxire.pdfIn PDF document text
    • https://beponelife.weebly.com/uploads/1/3/1/1/131164358/1d9b5e8659f56.pdfIn PDF document text
    • http://pressit.fun/30607430846dg6on.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxaxesaxejov.rf.gd/xisexuzitonokipa.pdfIn PDF document text
    • http://pagujuropiwadiv.rf.gd/musuzagi.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/chola_ms_health_insurance_reimbursement_form.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_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 5360 bytes
SHA-256: 751aad432269d8bd86b35f1b07dfc606923ee87bb09f31f1fbb8292c05508aff
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 10520 bytes
SHA-256: c5cbe112c5b3c91fd38f77af53cde9669246c65351d1ae9b45960e19370a5fba

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