Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba4f558c6763a5b…

MALICIOUS

PDF

75.7 KB Created: 2021-06-02 10:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88042b73b9633541e7ff24bca06014c8 SHA-1: d71c4760f750fc35e80197c177cebfc7e869db3b SHA-256: 6ba4f558c6763a5b7e1c21db2ff19e7ae19a9ea25ac1bbc4e02c54dc2c6e9c5a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to link farms, suggesting an attempt to distribute malicious content or engage in SEO manipulation for phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/pbw?utm_term=dianetics+pdf+gratis
    • https://mumotajesok.weebly.com/uploads/1/3/0/7/130738730/lapefifozimo.pdf
    • https://sufexijim.weebly.com/uploads/1/3/4/6/134679247/922aef.pdf
    • https://vemanilulo.weebly.com/uploads/1/3/4/3/134378365/7125220.pdf
    • https://gitokivoj.weebly.com/uploads/1/3/4/3/134316846/ditutuvifi.pdf
    • https://nugusogo.weebly.com/uploads/1/3/4/3/134319441/8197557.pdf
    • https://sasugitakog.weebly.com/uploads/1/3/4/6/134651708/bonexajagiwus.pdf
    • https://kajibelewori.weebly.com/uploads/1/3/4/3/134307873/8232330.pdf
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/vugizamena-mifowos-tusugimatizer.pdf
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/zotifavawebebu_wenekanif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://foxobekizax.pbworks.com/f/how_to_connect_multiple_oontz_speakers.pdf
    • http://zizovitunex.pbworks.com/w/file/fetch/144483732/23947232177.pdf
    • http://mogulazedub.pbworks.com/w/file/fetch/144497385/tratado_de_fisiologia_guyton_download.pdf
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144487149/bibavulajaja.pdf
    • http://zowonixepor.pbworks.com/f/nanorosivu.pdf
    • https://uploads.strikinglycdn.com/files/81c756d1-1576-4eb7-bb9c-2700ca2eab2a/what_size_camper_can_a_nissan_pathfinder_pull.pdf
    • https://uploads.strikinglycdn.com/files/a7187f1b-ab08-44b5-9962-bb8209cc570d/zepeto_hack_apk_dinero_infinito_2021_mediafre.pdf
    • http://zajozote.pbworks.com/f/b.sc_mathematics_notes_in_hindi.pdf
    • http://gipomebepate.pbworks.com/w/file/fetch/144454152/rosarovisadosipitufapuvi.pdf
    • https://uploads.strikinglycdn.com/files/b4d62886-4c88-4c0e-9952-155d78268416/how_to_activate_function_keys_on_mac.pdf
    • http://bovozajezo.pbworks.com/w/file/fetch/144440205/how_to_unblock_a_call_on_a_panasonic_landline_phone.pdf
    • http://vamafob.pbworks.com/f/vufapuvopo.pdf
    • http://mukibilevejo.pbworks.com/w/file/fetch/144446826/mipevi.pdf
    • http://zudilazo.pbworks.com/f/31100309654.pdf
    • https://uploads.strikinglycdn.com/files/22d91813-f3bf-4960-8de5-63e57a555f7f/elvis_presley_i_got_a_feeling_in_my_body_lyrics.pdf
    • http://sijomirurefi.pbworks.com/w/file/fetch/144443199/mafotisaratokibalog.pdf
    • https://uploads.strikinglycdn.com/files/3c5f50dc-9722-4b8a-8cef-4906437b715a/66299231846.pdf
    • http://banusiv.pbworks.com/w/file/fetch/144480975/zepusulilagezagifa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec77.bin
21b9e0f6b996379c962cb735a080e33528c9960282362fb5ec4facb5b87bde28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 5292 bytes
font_01_sfnt_off0000fe8d.bin
f0a579ca8251d602db65a577f2b020cad3db2134922dc1ef81ecab9e8923a3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10364 bytes

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