Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4c41b4e463f87b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-15 04:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f5188f9e1912f40460744dbc6eb18278 SHA-1: bd6d99f699de611ff0387295137d2d1162c1ee6a SHA-256: eb4c41b4e463f87b7351a4ab4d4a0f91b66ccf727ee0929031292954255e3c9c
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=short+riddles+and+jokes+with+answers In PDF document text
    • http://vojefo.greenalt.co.za/uploads/1/3/1/4/131483144/patinetemuxas.pdfIn PDF document text
    • http://files.gracefield.net/uploads/1/3/2/6/132681665/e659fe5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6923/3557/files/mechanical_drawing_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/74032482180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0365/5830/files/free_weight_loss_meal_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/jesow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/fractured_fairy_tales_cinderella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4072/7463/files/56020914587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/xutago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/frederick_ahl_aeneid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/49463999084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/bazakunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2067/files/java_list_initialization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/mejoretaketifejanefuma.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 5036 bytes
SHA-256: 00f6634e470ac47fcaf594f781aff9e03da0501304c4b637deb7dcf4be1c8fef
font_01_sfnt_off000085d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 10172 bytes
SHA-256: 4ed2c68d1e66c30abf8ae296b6322d0b6e7284ed8155c84e43bd922c2e453e2f
font_02_sfnt_off0000a896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA896 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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