Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeda45556caa6f45…

MALICIOUS

PDF

84.3 KB Created: 2021-03-22 12:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99f7411fd0c3930e2663994965cca28f SHA-1: 98eb358e1fe481e636adb8ebc9d9c7efb6d34a02 SHA-256: eeda45556caa6f4563ea4401fd460db789c7d9956dc773a2b04a1cf89cbe0ce5
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-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://vilenefex.ru/strik?utm_term=adobe+photoshop+7.0+tutorial+pdf+in+hindi PDF link annotation
    • http://fishing-rods2.club/easy_math_word_problems_1st_gradej0lcp.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/wotekojefamaletudemid.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/ruxijaga_takasika_losukepovevivu.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/emmeline_pankhurst_freedom_or_death_speech.pdfIn PDF document text
    • http://gekiwejal.scienceontheweb.net/fetugasomunavebukoxago.pdfIn PDF document text
    • http://item-get.top/english_words_in_japanese_pronunciationd0vnt.pdfIn PDF document text
    • http://lnstagramverifycentre.com/gunisofejaxfk.pdfIn PDF document text
    • http://tiktokhd.design/69252115193pk8g9.pdfIn PDF document text
    • https://rosaguvedofim.weebly.com/uploads/1/3/4/3/134352906/nexudijokalozewiso.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/tadevewuju/sekemerunovopujo.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/reruporuraxekug.pdfIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_5436b4d8998a42cbbf1e0eb9e684a4f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/how_to_write_a_good_employee_self-evaluation.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/centralstationen_gteborg_trafikinformation.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_83ae7518b23d44878ea78a36815c7dd5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/wubofaxozapuf.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_832d98a030b7458db2b85449d0d3bac5.pdf?index=trueIn PDF document text
    • http://sekuwomexapa.myartsonline.com/nowubufumevi.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_5e04af8505ae46dc9979a96193913923.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/16843699353.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_83b2818b39a8465b894888fd1c4944fe.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_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 5512 bytes
SHA-256: e176e87598e19fc82573cc8516f0c5d8bff21d116709c3f4a6ab79cf33174c8f
font_01_sfnt_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 11216 bytes
SHA-256: 7b38aca58a3ca1f1c321bde3b7fc6a2ce8678cec20ce527b9d75403bb087603f

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