Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7a3ea69a5fac57…

MALICIOUS

PDF

79.9 KB Created: 2021-04-02 06:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d35bfdf29d777cbc6b1855a7374e5ac SHA-1: c01fe312ec611ab3e1d9c1493bcf9e133d55bc4e SHA-256: 9f7a3ea69a5fac5701ea4cdef7c5d30e1a5bc88f5c3441d9f7eb8ce5c4e515b2
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://botokaw.ru/strik?utm_term=how+to+make+rice+in+aroma+rice+cooker PDF link annotation
    • http://bukobaxaz.getenjoyment.net/lerabatuleba.pdfIn PDF document text
    • https://ribuxelezisif.weebly.com/uploads/1/3/4/4/134470012/peniwakorexepunomos.pdfIn PDF document text
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/c0f8f35.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/8512175.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/1429048.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/h1ighaT/42639037363.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/jehjgbP/57284761185.pdfIn PDF document text
    • http://woronari.getenjoyment.net/fotinapiwukuwe.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/absolute_c_walter_savitch.pdfIn PDF document text
    • http://mofonuf.medianewsonline.com/how_to_convert_sawhorse_projection_to_fischer_projection.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/wumavilosuponisijoke.pdfIn PDF document text
    • https://wilumixomili.weebly.com/uploads/1/3/1/4/131483065/fibeluwuluj.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/dirk_gentlys_holistic_detective_agency_season_1_episode_5.pdfIn PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/209264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_ce6badc6959044669e95452740455a76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/19628311175.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/palmistry_in_telugu_language.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/93787392168.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/lux_support_guide_s9.pdfIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_18f7b5aea7634bebb6fd593bc35f08e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/pusazusafen.pdfIn 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_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 4852 bytes
SHA-256: d1b4a0ba743380652e42f5e81e9300d883bfd3056d0e027d6ae42d30b9e86eaa
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 11044 bytes
SHA-256: d036735245533bca83d6a9bc83e9ffd0e66e2ad92062bdb0eacad63cadef0af6

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