Malicious PDF — malware analysis report

Static analysis result for SHA-256 5529e1c4f82a8d34…

MALICIOUS

PDF

86.5 KB Created: 2021-03-17 10:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: da91610542f986163f8127c89d67abc2 SHA-1: b264bb3e3d1309db186ebeb79514a88bfa462c1b SHA-256: 5529e1c4f82a8d34f42c675fe1d7789892fb6925dbb622047c6dcd9ff6a490ec
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. 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 clean score 0.1266

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/strik?utm_term=how+to+find+fourier+transform+of+sine+function PDF link annotation
    • http://magazinrf.xyz/xilenazumirusrsamn.pdfIn PDF document text
    • https://lojodisomu.weebly.com/uploads/1/3/4/0/134042672/c906d.pdfIn PDF document text
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/kidujow-zawanevebadumi.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/mikafikivaf.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/875e628d6faba.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/juduzifexexidadisa.pdfIn PDF document text
    • http://iciko.xyz/nomovakinejogodisar55kxo.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/7158fb4.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/function_in_ms_excel.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/7880518.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/f1467c46fd0ad.pdfIn PDF document text
    • https://wojadamizaxit.weebly.com/uploads/1/3/2/6/132681796/6853749.pdfIn PDF document text
    • http://webimedokawuxun.iblogger.org/47556047310.pdfIn PDF document text
    • https://xevowuzari.weebly.com/uploads/1/3/1/4/131437308/xujinaluxan_juligonix_pexofi.pdfIn PDF document text
    • http://razvivatel.blog/connect_ipad_to_brother_wireless_printergrhy4.pdfIn PDF document text
    • http://stc-l.ru/vexivoruxubowa8no0z.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/forupokisip/68899397904.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/craftsman_lawn_mower_6.75_190cc_air_filter.pdfIn PDF document text
    • http://mutifitiwexo.epizy.com/diagnostico_de_anemia_gestacional.pdfIn PDF document text
    • http://kovawasokagi.epizy.com/gulokibijisagebiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/driver_hp_officejet_6500_wireless_e709n.pdfIn PDF document text
    • http://nugonubofatu.epizy.com/kilabinidajisujiromogema.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 5188 bytes
SHA-256: 09e27680dadb21fbd363fe21267fc751cd2a87b464ea66e49f7256657070fc5b
font_01_sfnt_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 12816 bytes
SHA-256: 5c9a09a1c6fec01e793c00d286df5c69ef81f26ebdd404a63979433f93689a9e
font_02_sfnt_off00013eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB6 16480 bytes
SHA-256: bc03a8e2100e1a117952d6657fe809375c8a1ab83bfef7d2755730b4e7a73061

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