Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad70b015555874a…

MALICIOUS

PDF

94.5 KB Created: 2021-05-13 02:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3147f1f90e73b8ec09cd73fc97366057 SHA-1: 1754213c34379717b0da2e91dea16b3ac89a6684 SHA-256: 8ad70b015555874a62a9b66bc42c254cad6f237366b34aab2d903a940614e123
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 a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pelibifir.ru/strik?utm_term=cat+eye+velo+7+wireless
    • http://ipoteka.net/83265462667t3gno.pdf
    • https://gudugobaxav.weebly.com/uploads/1/3/4/5/134500737/mokulatiki.pdf
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/suzokifed.pdf
    • http://ziwavabewite.66ghz.com/lg_nb3530a_sound_bar_review.pdf
    • http://gonalotuturopil.mywebcommunity.org/sequence_and_series_formulas.pdf
    • http://prizinsta.site/halfling_names_pathfinderlfv1i.pdf
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/5305561.pdf
    • http://doporujela.iblogger.org/which_is_the_best_version_of_macbeth_to_watch.pdf
    • http://twirlini.com/zifurefebuj6x9a.pdf
    • https://sididipukiwe.weebly.com/uploads/1/3/1/3/131398020/xonivoruzimakamiwam.pdf
    • http://helpcenterbusiness.xyz/somupojunebegiqmttp.pdf
    • https://xunumiselodaz.weebly.com/uploads/1/3/0/7/130775676/3424555.pdf
    • http://useraisins.pro/mavowuvoguw05ij5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://papixunaz.epizy.com/ap_calculus_problems.pdf
    • http://mijovutotukedes.onlinewebshop.net/jisixesuwipedegareb.pdf
    • http://sojisanomup.epizy.com/69044463972.pdf
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_209f0a261cd845f290e378529f44e26a.pdf?index=true
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_639e3e07ab334a0891c5f82b91a0cb7a.pdf?index=true
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_a0b36938c4ba488f856af504b60aa73b.pdf?index=true
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_f3b94dbed75e4012abdfa649dc0223bd.pdf?index=true
    • http://fevejalamozek.epizy.com/condiciones_iniciales_atmosfera_primitiva.pdf
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_11dd337187fd49dead290dc2b8de864c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dc83f6f0-e06b-4788-b38d-cfe5775e0d9f/41349508112.pdf
    • http://tosijikis.onlinewebshop.net/18209652099.pdf
    • https://uploads.strikinglycdn.com/files/eede6363-571d-4758-88f5-988a39f7fe96/how_to_put_wahl_pilot_clippers_back_together.pdf
    • https://uploads.strikinglycdn.com/files/2f2ece69-903d-48cf-ad0e-e8a26a5ff6dd/how_to_setup_echo_plus_2nd_generation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001158f.bin
7a568eee019b0ea6ebe90e744deb4fed1920602b470ee41b6a17ae405b5f8be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 6276 bytes
font_01_sfnt_off00012ad3.bin
38ea8c2af7c56041b89518bb4f806717dc1cf79bdc72c799870f3b8e25666338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 4916 bytes
font_02_sfnt_off00013bba.bin
aafb069abb91a2ba89c37c611847f0af007d3297b561f6505b0a76cb79594191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBA 16508 bytes

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