Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3107293a3dcf2b6…

MALICIOUS

PDF

42.8 KB Created: 2020-11-01 20:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7d028493449817a35e8400c4f14fa899 SHA-1: 1e5ee946e472b8ba75ea24b5b0a5257f8f997d0a SHA-256: c3107293a3dcf2b660b5a4a1ae4351e0f6ca855f22a8770e546520d9bc7816dd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors or suspicious PDF files hosted on Weebly. This suggests a link farm or redirection scheme designed to distribute malware or engage in SEO manipulation. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=draft+horses+for+sale+missouri In PDF document text
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/polub.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/kugapusefepafazixa.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/pulod.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/dudabuvopamozeku.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/vebimadovabuvab-gilibubu.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/zotunol.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/bokamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7656/5141/files/draw_a_cladogram_depicting_the_evolutionary_relationships.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/43836869774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5791/2245/files/deviditezumasuvup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4739/4719/files/lobumebepa.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/45049985051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/car_driving_school_simulator_apk_hile.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/sedilasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1881/0024/files/57351810698.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_off000066f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5004 bytes
SHA-256: 03ee2c213c613a215e96acb761329bc4af4a8120047cb7ae5e32ff3da1b271b1
font_01_sfnt_off000077d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 11280 bytes
SHA-256: a74e3050e24f8ddc72afc4ee260fd16b27065e1b5b508ff755ea14e9013678ef

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