Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d1278acedec58f…

MALICIOUS

PDF

90.8 KB Created: 2021-04-07 20:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2b0de54d1082b9a6feca3b293495df6 SHA-1: d8ba7c4e14371b2662f117495820a4a54d3be031 SHA-256: c9d1278acedec58fb9c667c2d2d9661e94f254b8b5e325aca4d3e29ab7177ad7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=kangertech+subvod+manual
    • http://sufupisiwe.22web.org/69917546659.pdf
    • http://zopesozali.mypressonline.com/nawetaziwugotozudiguwaloj.pdf
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/3c7e5a72d848.pdf
    • http://cmb-eco.com/pivukusoysvyg.pdf
    • https://jimilosebot.weebly.com/uploads/1/3/4/0/134096588/nibibowenipifobuwo.pdf
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/fegofiselipi_tapafusamopadoz_debabewabu_xipubixapeni.pdf
    • http://wiregabjuk.fun/bearded_dragon_names_for_malefod6a.pdf
    • http://fresh-ita.space/69599652563fhuzc.pdf
    • http://civiliscmq.online/bogojijebitopubewarakusudc762u.pdf
    • http://itanah.space/que_titulo_nobiliario_tiene_natalia_figueroaqczlt.pdf
    • https://zewelujipe.weebly.com/uploads/1/3/4/8/134846298/f6fcedf191.pdf
    • http://uscovidcharts.com/photo_collage_editor_for_pc_free_download2rer2.pdf
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/vigejax-kowuzodedo-damotemimufenev-fejadej.pdf
    • http://erethiztzj.space/66408071015w4o6a.pdf
    • http://italywow.pro/243705221868c5ox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_7e3b07857bfb4b28904a62bd3d3fccc8.pdf?index=true
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_5c5e8bff45544cb3a93604d24c7fc164.pdf?index=true
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_b73965c532b94490824a47eeb6f62a7a.pdf?index=true
    • http://sinusudixuxuwad.atwebpages.com/new_cutting_edge_intermediate_workbook_with_audio.pdf
    • http://dolifusekaxug.epizy.com/what_is_considered_full_time_employee_in_ny.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee1.bin
b5282fe64cb7348688b51b6d1e34582825fecf8f83fea1b50da0d393fac362cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 5520 bytes
font_01_sfnt_off00012184.bin
19a90c8959535634a72091e92de0f5d58347e98dd438c2d7c7530e213fc3d561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12184 11368 bytes
font_02_sfnt_off0001489b.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1489B 16092 bytes

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