Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a13419bf784645…

MALICIOUS

PDF

75.4 KB Created: 2021-03-16 14:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 830ee8abde380fb18b438a965b5d54e8 SHA-1: 50f72aefe6885dfdfa9521ca17a1a79813e8c852 SHA-256: d6a13419bf7846454253621f7860dc0bd94494c0dac78f8950ede3aa94483509
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=airlift+song+download+likewap
    • http://triple-doska4.club/secret_neighbor_apk_downloadj077o.pdf
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/5530b49eb.pdf
    • http://italywow.space/85533282213q1lq0.pdf
    • https://gejipowuxenufo.weebly.com/uploads/1/3/4/6/134681439/botojewegos-kisugufa-wijesovari.pdf
    • https://zopokobo.weebly.com/uploads/1/3/1/3/131383813/tomodene.pdf
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/fa3efd.pdf
    • https://cdn-cms.f-static.net/uploads/4420237/normal_6023d501887fd.pdf
    • http://goproits.com/king_arthur_and_the_knights_of_the_round_table_movie_2004bgei4.pdf
    • https://tepadomuxufebe.weebly.com/uploads/1/3/1/3/131382092/fobisi-zejofetaduvejow-barososolo-tunizixo.pdf
    • http://copyright-help-center.com/tigazomeril5o168.pdf
    • http://befigter.xyz/qu_da_cae_domingo_de_ramoswjlg4.pdf
    • http://apeech.ru/personajes_importantes_de_la_independencia_de_estados_unidostivy6.pdf
    • http://popularchoice.space/big_bang_theory_wolowitz_mom_diesp3i3b.pdf
    • https://static.s123-cdn-static.com/uploads/4493545/normal_5fe2d938bbf04.pdf
    • http://load-bcp.com/the_monkey_king_movie_jet_linvgtd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_1bbfe4df88ce46b1919ca7b0cadca474.pdf?index=true
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_9fc49a4bc8e14f509f78707cfc310538.pdf?index=true
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_0f7796d6d35149e39c40b98675df9f6c.pdf?index=true
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_c857774e8f5240059d43fb65541ea62a.pdf?index=true
    • 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_off0000e988.bin
635279ce55955748e3c69a6b6a8a8657675311f5447849292b073f2cd1df8813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 5356 bytes
font_01_sfnt_off0000fbe8.bin
c6b4e39e9853455824dab809142edf1debe8996dd543d2d6fbdf8ac9b3fc7a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 10828 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.