Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b89a5163c7ab1d…

MALICIOUS

PDF

42.1 KB Created: 2020-10-30 10:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: aa34b50c545329f85c0b982dc787d543 SHA-1: cb30d065e53312af6139d004a6173b3ad510c82c SHA-256: e2b89a5163c7ab1d79b36262427612a2a147ab128f51eb26a46d96a9084d5ea2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.cc/pify?keyword=roots+function+matlab In PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/1677441.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/8198299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87527021fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f873edb04aff.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/5160106.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/7aba71.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/dupeni.pdfIn PDF document text
    • https://susopusamug.weebly.com/uploads/1/3/4/3/134336197/xewirak_legodew.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/1/0502/1794/3194/files/related_rates_calculus_cone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2141/3785/files/sman460_micron_gauge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0970/9474/files/96462200052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9445/1387/files/15902289692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1998/1746/files/24709179435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7840/9123/files/beatus_ille_antonio_muoz_molina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9857/4500/files/blood_transfusion_monitoring_guidelines_2020.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_off00006461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 5076 bytes
SHA-256: 01a7376ad5d7ffe157d75a6773b62fbf798626e482ccccbb66ef27eac90d47f7
font_01_sfnt_off0000759b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 11156 bytes
SHA-256: cfc78c46ab492028fa019598e4a9675130eaf1f786b2fb9875f1555b07b605d8

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