Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bda2165b0b27998…

MALICIOUS

PDF

83.0 KB Created: 2021-03-01 14:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c65f789db1a4881d2b805af5151b0f40 SHA-1: 517d3f58a051c7fb5025c05c0f5f303033989b70 SHA-256: 1bda2165b0b27998c329c211d5c951e8c8ac1ebf4662ce5d2c6a923d96a89446
142 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. It uses an invoice-themed lure and an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/wix?keyword=free+gift+card+generator+apk+2020 PDF link annotation
    • http://moitender.org/29224137668r0a41.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/hsghhgg/30846219243.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/define_flowchart_proof.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/delonijovubi.pdfIn PDF document text
    • http://tesocoin.online/zbc_hla_buledfs.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/eghhjic/foxawanuzejado.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/89527813044.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/hayward_power_flo_lx_1_hp_pool_pump_w3sp1580.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/how_to_change_clock_on_samsung_microwave.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/kefalotoliwozixejateki.pdfIn PDF document text
    • http://hookup666.site/zufodogokomaririnofqtc4.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/self_performance_review_templateb75yc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_602fd1fdc7b13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xitemefunugege.epizy.com/nvidia_shield_android_tv_2015_vs_2017.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/30061573553.pdfIn PDF document text
    • http://bakotisimipivok.rf.gd/eyebrow_shape_guidelines.pdfIn PDF document text
    • http://derasowuras.epizy.com/peziwakemogijorabefinojot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 5408 bytes
SHA-256: 78c75ad51778d43f70ba120bf6bd1ba44ae16ba541bf2ed3bdcc45bbb58f86ed
font_01_sfnt_off000119f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F9 10824 bytes
SHA-256: 0da3e158a974b8baf9b4e72b925284a03e61a96f86cdb10dd19e50212bc90169

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