Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0449e4b9e21eb77…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 05:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5b7baf63d69afa6ecb0f25cd8520521c SHA-1: 508bb3ab555a5353f473e7322d27851d8b13d685 SHA-256: d0449e4b9e21eb778ef1683a7633f585ac1efcef3fc2f511bdc55fbdb89feefc
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or trojan distribution attempt. It contains a large number of external links, forming a link farm hosted on disposable domains, designed to redirect users to various malicious PDF files. The presence of these links and the overall structure strongly suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/123?utm_term=adobe+acrobat+x+pro+edit+scanned+pdf PDF link annotation
    • https://nixunirebexif.weebly.com/uploads/1/3/0/7/130776125/4853122.pdfIn PDF document text
    • https://xuremesedadewo.weebly.com/uploads/1/3/4/5/134500919/fujotepirur.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/6705670.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/77542554679.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/fhbibff/20506608432.pdfIn PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/6486356.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/kafilagesuwurerox.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/iefghlF/jekenijolidegujan.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/fWhgvbu/55083591660.pdfIn PDF document text
    • https://namadifudemabum.weebly.com/uploads/1/3/0/8/130813063/7477981.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/Zihfqie/ruzudibugi.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/hbl9Wxv/on_my_own_chords_ukulele.pdfIn PDF document text
    • http://degimogug.mypressonline.com/how_to_fix_a_water_softener_leak.pdfIn PDF document text
    • https://cdn.sqhk.co/vemupanilow/8ichjge/56312511904.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/jibowajoxirexeduvege.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/ghinqOU/repipebo.pdfIn PDF document text
    • https://mixenabunagoxo.weebly.com/uploads/1/3/5/3/135320093/raboxomapoginef.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ij4jbF0/forge_of_empires_hack_apk.pdfIn PDF document text
    • https://xopapukewude.weebly.com/uploads/1/3/1/4/131408664/f34d645643730.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/adobe_reader_9._5_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_ca0abbc607c14247b7884ba9d1b35e3b.pdf?index=trueIn PDF document text
    • http://gupatevefojip.myartsonline.com/apache_poi_maven.pdfIn PDF document text
    • https://04fd4788-ed9c-4cd3-99f9-ca92bb8352cc.filesusr.com/ugd/8b97dd_40540964d13a41618b0f8cc1176ae5fe.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_50153c18a74a458db36c0eb5295e15d3.pdf?index=trueIn PDF document text
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_37a918c9b01b4c818615e35f375bb1c3.pdf?index=trueIn 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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5312 bytes
SHA-256: 6ed7f4859d12e55d2cbbcea2345c83a8e65ba1b8b717a0d2865f6cc0f44a792c
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 11324 bytes
SHA-256: bf547150fb99c6a9995320c6621e5b6f86b58dc990529069ad0d849b1fcc4743