Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba2e04810f5380e…

MALICIOUS

PDF

76.4 KB Created: 2021-05-07 10:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 61d26f6b7c2aaf59b909ede2b0b1fd1e SHA-1: c964497231b3e8504fa354cb9032e0a4e1b84e2a SHA-256: dba2e04810f5380ec8d87b00060a97ed62f3b148e8462f5db10cddf0e22b084b
156 Risk Score

Malware Insights

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

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 0.9996

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 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.
  • 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=paper+menagerie+ken+liu+analysis PDF link annotation
    • http://moresukko.ru/verizon_message_plus_download_windows_7le5mc.pdfIn PDF document text
    • https://bifutizuwosedi.weebly.com/uploads/1/3/4/6/134645412/kikado_gadujop.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/27856519843.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/19936452582.pdfIn PDF document text
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/5664870.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/bcg_matrix_of_coca_cola.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/79495065489.pdfIn PDF document text
    • http://wiinorama.fun/depexegisowufoluduxasvmcvu.pdfIn PDF document text
    • http://eurofamily.pro/rukapunuraxinonul9d6tj.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/tezaforeru.pdfIn PDF document text
    • http://profoto22.ru/song_of_ice_and_fire_westeros_mapulool.pdfIn PDF document text
    • http://salleapp.xyz/mumuxuwijetobawifefazenofvhbfl.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/535100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/haemoglobin_formation_needs_both.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/5544818414.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_74b4a0a358ec48789f9947e8fd572a04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dumupa/14887906155.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/75441549548.pdfIn PDF document text
    • https://a0758896-f8c2-4fc9-8c7e-5c1738e8bc18.filesusr.com/ugd/0ce882_ca2abc287c9e469893499f2c439d0c5f.pdf?index=trueIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_590d904e99744e34b2af7a983a959d36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/how_to_restore_sony_bravia_to_factory_settings.pdfIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_cb85b5970953481da357f0d28adfca6e.pdf?index=trueIn 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_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 5304 bytes
SHA-256: fc3a2bf3888e7c02a6f082eee1cbeb655763d29b356be51cf1af4f4230e61d83
font_01_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 10440 bytes
SHA-256: c73c23c1a8885a2e5909e94cd12ac08c50ff90ca0da77344928fd1f545fdf6de

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