Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15c455f1abd344f…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 10:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 72bc03395703c527cc8eb5b199a469e8 SHA-1: 9b9188402c9f0c0914c2da85641c4ba51f48b0a6 SHA-256: d15c455f1abd344f2a429e7af1f750fb383dbbc30175ec96ff8522e33636efd8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or SEO spamming operation. The embedded URL and the PDF's structure point towards a phishing or redirection attempt, likely to distribute further malware or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=what+store+sells+check+registers PDF link annotation
    • http://ruvogodozipabiv.scienceontheweb.net/53956873387.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/dish_network_bill_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ffd82ea1354e.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/6769a16521a.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/efc14e7782bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_6030cb465f24b.pdfIn PDF document text
    • http://www.fotolia.com'gt;handsIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/bbc_sport_live_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/free_printable_party_invitations_templates.pdfIn PDF document text
    • http://damikofem.rf.gd/al_kahfi_1-_10_maghfirah.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/boards_and_beyond_step_1_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/wadosakazakefiw.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/41498376991.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/kotigiroxadaz.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/butterfly_life_cycle_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/zenakaderoguv.pdfIn PDF document text
    • http://www.fotolia.comIn 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_off0000e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 5140 bytes
SHA-256: a0cfc5650b3cbcb85df3813625f0375dfa73221c442369fa0c388413e4ef9c71
font_01_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 10072 bytes
SHA-256: 2d9da3a214122682d8f0af105b79a92f08f68954e9745e75c33a25dcdce6deee

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