Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d6b115d25938db…

MALICIOUS

PDF

76.8 KB Created: 2021-05-11 05:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 037541095fd4cb297a359a2f18178283 SHA-1: d7ecd193b9e17ae950b2559538b2e138af8ac7a4 SHA-256: 93d6b115d25938db0d6f6b06e67c1ef7dec55da2532794fcf2ed48b6ad264ea7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+much+does+a+private+investigator+earn+uk PDF link annotation
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/7728079.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/jelumexetafivenofil.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/jokon_mogugut_rogizurobakeju_memev.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/ggexheV/sipeloxexu.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/photos_ananas_free.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/icls7ha/try_not_to_laugh_impossible_challenge_hardest_spongebob.pdfIn PDF document text
    • http://bebinovixox.iblogger.org/giwonoza.pdfIn PDF document text
    • https://defosojuregoko.weebly.com/uploads/1/3/1/3/131383900/bifutaliwuxo-rifuvepupil.pdfIn PDF document text
    • http://peregukejipesa.iblogger.org/advantages_and_disadvantages_of_spreadsheet_software.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/Szjgiam/75598831418.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/gapelidoxalun.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/fipufatu_kikudu_mosexobim_sowike.pdfIn PDF document text
    • http://bevojufonurol.iblogger.org/what_is_resolution_in_plot_diagram.pdfIn PDF document text
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/03058a2ea6509.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/Mahfnjf/extreme_car_driving_simulator_racing_games.pdfIn PDF document text
    • http://gasorutika.iblogger.org/89607571369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxutonugosafer.epizy.com/takufadutex.pdfIn PDF document text
    • http://buxazub.epizy.com/pixawekusib.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/67464579725.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/gejiguwuwejilinejokesa.pdfIn PDF document text
    • http://fusiwati.epizy.com/sikevawetoj.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5632 bytes
SHA-256: 7b088926b44dc229ec95e886ce473eb741a7a9f2af32526de24ea6ea84ff01d3
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11124 bytes
SHA-256: a9f63faeeca282412848e0287842c8d89accf3986300b1d652b624a80c5addb3

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