Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1acd9de64bf9d1…

MALICIOUS

PDF

67.5 KB Created: 2020-11-24 03:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 62fd94350a9af44dcf472b8bdfdcf069 SHA-1: 233371867b317ccd006fe7acbe4670d09c36abf4 SHA-256: 9e1acd9de64bf9d1e99795e2a21dd23e2e964d4820ac248ca06d8eac2fd54702
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffking.ru/strik?utm_term=breeding+season+7.7.1+debug+codes PDF link annotation
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/komir.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/b3285aa.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/wunojipu/terminator_3_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e997cf-dcf2-48df-b3fe-468ab2cdeea5/marc_faber_libro_encima_oro.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/11148737578.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/mufusupipewepijepa.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/dragonfable_epoch_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/church_of_nigeria_anglican_communion_liturgy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc36b3a-3bed-4b24-8815-86eed47c7ec1/96801517458.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/chokecherry_wine_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/p_words_describing_food.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/harvard_referencing_example_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06943cb-4adc-4a3b-84b5-362e02a1b1ea/42676025568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff64c043-e532-4a84-b1cf-5475412b94fc/44643756592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6994046d-bf90-4477-9142-c4c8b5fd89d0/wowemamijelatilenemuru.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/59810494087.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_off0000c9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 5428 bytes
SHA-256: e883f48be821ed795c7388d860fc95ce7ea2ef7345794d7cc2a9d00c06426ef5
font_01_sfnt_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 10760 bytes
SHA-256: 95cf41fcfc0cadc2ead2cc246429bf3423181d1481cccbd39a1ac9e20d0ae256

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