Malicious PDF — malware analysis report

Static analysis result for SHA-256 5290454a47bfff2d…

MALICIOUS

PDF

65.0 KB Created: 2020-12-21 01:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a32056aa196e9f87d3f973fc02eb9962 SHA-1: 9bc1020db9c49c669d478caec5698a948582e940 SHA-256: 5290454a47bfff2d9aae8660af90dfb1f8d9f0e53221159a0f6533736d32fcba
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=photo+to+video+maker+app+download+free In PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/69876a3e05c4e.pdfIn PDF document text
    • https://mazekijaxok.weebly.com/uploads/1/3/1/4/131453602/maxamosunurokiboda.pdfIn PDF document text
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/2940fb7bb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5fa6ebb2379e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f89d4a8c403e.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/wovojojovisusukit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5fcf452ef13c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe161cbc819f1cf4a0ad09/1606293021309/bell_bike_speedometer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/82779089063.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/1932_plymouth_coupe_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/kiwozobaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bufevetuxefedugogu.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_off0000c246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 5320 bytes
SHA-256: af278886bc6021a8fded3bf87751f2eb54ace61fb1b6b9942f43f6a660754f53
font_01_sfnt_off0000d448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD448 10300 bytes
SHA-256: 51a7c141ebb7c63927990f2a9cdca25acf32cb05711d0ab328651ae5c9574e88

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