Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d815a677a4669f9…

MALICIOUS

PDF

68.2 KB Created: 2020-11-24 12:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3db1c301c0b5c9d542b5f953bbd1edb5 SHA-1: b53bae8b9a6d453b9dad76100180641d19b67c8f SHA-256: 9d815a677a4669f9ff4cb91ff51d336ed23e8bdd1079f0c7a3aded06958327a6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains, indicating a link farm or SEO manipulation tactic. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one URL leads to known malicious infrastructure. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection tool.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=free+printable+dinosaur+coloring+pages+with+names In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://gifitutopa.weebly.com/uploads/1/3/4/4/134470147/5121309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5fb92da95cb4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fbbbb7e43e72.pdfIn PDF document text
    • https://kavafarosodox.weebly.com/uploads/1/3/4/0/134097584/zobejematalek_mogufevo.pdfIn PDF document text
    • https://mekukirofex.weebly.com/uploads/1/3/4/5/134589797/woxigobeb_zumerile_bokofek_galulezavefeki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5fa5694515486.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/bifamomove/nba_fantasy_injury_report_rotoworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc39cae7-fad0-4902-b2b1-69ccf7097311/paralegal_cover_letter_no_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73a9a57-8c7b-4863-a325-fb760432e07b/65089066302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650f0c0c-5533-4db6-8a30-e3d7e91e3fac/desa_specialty_products_doorbell_man.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/81596720996.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/guvenurokumorugozizarados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cb126e-c616-4ab4-8f46-300e88d68a6c/gagupaw.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

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_off0000ce86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE86 5676 bytes
SHA-256: 3f2dcbdc701673a20a3559d0b6ca726386f2d5c3ccd1b2e57572c8fea2767508
font_01_sfnt_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 9948 bytes
SHA-256: 421fcba0d3fa67fe7c83e8188533b0b998aea293d3566fb5ab1e603a2d433281

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