Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17f390606ab2536…

MALICIOUS

PDF

74.0 KB Created: 2021-04-05 21:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3445042c5f00a3415185c60952fcba49 SHA-1: ed87c9b355cc35039ae173f2c458f4b5d4753284 SHA-256: b17f390606ab25365e72e50f924da9f8dadee28af145107de34389a040927ae6
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=far+bar+addendum+to+contract+pdf PDF link annotation
    • http://ladunosim.sportsontheweb.net/73011209330.pdfIn PDF document text
    • http://useporte.xyz/sig_sauer_p238_hdw5t4s9.pdfIn PDF document text
    • http://jadebey-x.com/dosokosogosevezubirekonqbbkz.pdfIn PDF document text
    • http://itdiscounts.info/60978849756t57yg.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/pride_and_prejudice_online_movie.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/wolawatin/dopawilinef.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_fca7902260064d259e2121646959e248.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/definition_of_morality.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_df3c4527478b4eb7b005b3384b3ff9a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/dababomunezigalinu.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/o_behaviorismo_de_watson.pdfIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_9440fec367384acb9b5da3439b22fd66.pdf?index=trueIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_c90ab28f2bfb4a259113bea38017eca8.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_fcaab430acb44c1898661c6d17a764c5.pdf?index=trueIn PDF document text
    • http://ralirajuz.atwebpages.com/vemizosagadunufupa.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/the_culture_code.pdfIn PDF document text
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_375390f2e6fc48aa9eb60f9fa3c893a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/41549503232.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/nikuvof.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_f976b931ddaf406a88bea221f0fe339c.pdf?index=trueIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_27f4699228764f63a468a2ec8f108a1e.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE525 5188 bytes
SHA-256: dcb0ad35d06ca848aeaa688d7142e7148e504d8e61972f1f5bc18441e0a72ac6
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 10628 bytes
SHA-256: d6746d8310a63df6cac39f574ff998b212afd7ff9477fc59757825e1e2d7dc32

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