Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebaa657452852f9…

MALICIOUS

PDF

86.0 KB Created: 2021-02-18 03:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2a2293a8d2d54f4f620bd1f5076467e6 SHA-1: e46d2cd695c3ba8533e33c762343b5f34c6df645 SHA-256: 6ebaa657452852f9b56730c36660528e038b261669b51c1b543e9eabc69f2670
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The primary URL, https://jacksth.ru/wix?keyword=skyrim+paradise+halls+how+to+sell+slaves, appears to be a lure for users searching for specific content, redirecting to other PDF files.

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://jacksth.ru/wix?keyword=skyrim+paradise+halls+how+to+sell+slaves PDF link annotation
    • https://pebufaso.weebly.com/uploads/1/3/5/4/135400671/zipekobexek.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/dozukexezupobit_xofif_kovapager_guvuvukux.pdfIn PDF document text
    • https://saxunada.weebly.com/uploads/1/3/4/8/134865385/dobar.pdfIn PDF document text
    • http://megalit-korolev.ru/8827710841ts1un.pdfIn PDF document text
    • https://wudufedowuton.weebly.com/uploads/1/3/2/8/132815791/fafozitufuto-mogokikepa.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/6761441.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/ruterivu_bawazem_pujesuma.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/5048632.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/8060979.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/9abd3407.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/8179291.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/pizuzufijibe_bakujo_giveboxo.pdfIn PDF document text
    • https://bagawilikazukir.weebly.com/uploads/1/3/1/0/131070307/gebodagefizoxubirud.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/jisufivajosijunegik.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/lakujusitejojet/jawozuvanikafijolezi.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/19305087766.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/business_plan_template_harvard_business_review.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_off00011432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11432 5620 bytes
SHA-256: aa5147b0dbf920e2d3b34d6719714247785ea6e7ef16a9c8e9207f5bf1bec453
font_01_sfnt_off00012744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12744 10352 bytes
SHA-256: 34ca44d7155b61a4ba043c104981f2a4b46a4a54850d95cc0aa736cbb91c1d97

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