Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dfa2ee1ab7837f…

MALICIOUS

PDF

32.8 KB Created: 2020-11-07 07:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 91bd76f36426a9a94a8dd3aee334e9d4 SHA-1: ee446acb83a00a7d24214a29a0a2b1fbd65d34b0 SHA-256: 90dfa2ee1ab7837f4ac09f2e2aa926572631a7f9a8ca5321e669f0f0b8268097
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that functions as an SEO redirector, leading to a phishing page. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to lure the user to a malicious site. No scripts were extracted, but the redirection mechanism is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffset.ru/aws?keyword=cleveland+browns+seating+chart+view PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5f9c452a4418f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f9c9a3b35ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f9890d5cb863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f97b1dc22454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fa41eebcf4b8.pdfIn PDF document text
    • https://fejagirizow.weebly.com/uploads/1/3/4/5/134525681/3350501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5f9907cec584e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5fa45b7c475d2.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/biwubeleba/analytical_mechanics_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/action_research_report_for_b._ed_students.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/87386736271.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/vitifezepaxevag.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/furifijepijete.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_off00004218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4218 5400 bytes
SHA-256: 7fb6bdd73e045ca345378a101ab4f3fcd52f1e686fb6fb7b635086f8947f22f4
font_01_sfnt_off0000547a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547A 9952 bytes
SHA-256: d5cbdb34045ee9a5e890625970844bf22fee33d96bfd199055838705d5946696

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