Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab578088f67822fd…

MALICIOUS

PDF

52.2 KB Created: 2020-09-22 20:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b08ff505f84bb2f8abd1f148fc90a74d SHA-1: b70e616eec2445751e7b5035e384a1e8aa27bd4d SHA-256: ab578088f67822fdf5eb81b6d7da0243bdc7e1577afa2f7615ff99b6e1ff966e
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.com/wix?keyword=multivariable+double+integral+calculator In PDF document text
    • http://raxalabo.thelabdesigngroup.com/uploads/1/3/0/7/130775027/xezuwabefadofe.pdfIn PDF document text
    • http://xonisimi.pcricecream.com/uploads/1/3/1/4/131453175/357937.pdfIn PDF document text
    • http://files.soulandsynergyec.com/uploads/1/3/1/4/131454270/gewolun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29f753d5-df92-47ee-b42a-0abf088d9d17.filesusr.com/ugd/98d33d_e62c2e39078e442e9ba015aa51c80fe4.pdf?index=trueIn PDF document text
    • https://716a7708-9394-4491-b093-32c07a6511b5.filesusr.com/ugd/73cb9e_633e22daa29840f3bb5fdfe4a436f688.pdf?index=trueIn PDF document text
    • https://151bc243-5bfe-4310-818c-c7c5994d904e.filesusr.com/ugd/9f2514_a29c3dc134c245d49270b819f6968a45.pdf?index=trueIn PDF document text
    • https://ddb7c9c2-6ec1-4b9f-bc85-5717c5e47dc3.filesusr.com/ugd/bb05c1_bbb42ff716274ec88c1f9db140998596.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/nokupodixivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/mecury_outboard_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/95345741301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/64334538911.pdfIn PDF document text
    • https://2f79b0c0-f08c-4073-aa0a-824637cf3ee3.filesusr.com/ugd/90c678_ef49a0d385ff4a6b8e649937c1390f64.pdf?index=trueIn PDF document text
    • https://fe83cb84-da7f-42de-9c6e-f6077e6b786c.filesusr.com/ugd/9c58c5_262a546feccd4dd1890c469ff133d920.pdf?index=trueIn PDF document text
    • https://02e4bb9a-1a9f-48b5-b7bd-889043055133.filesusr.com/ugd/3fb742_a637d54e21844e17aedbf861bee0b574.pdf?index=trueIn PDF document text
    • https://2c0af782-fbb7-4a2e-937b-5b5ff2f1a484.filesusr.com/ugd/0e9fc2_60f26443ae274523a9868289c8bd13a8.pdf?index=trueIn PDF document text
    • https://f25f2e00-ee5e-4c4a-86e8-9acc7dd5e7c8.filesusr.com/ugd/0bfb20_cbd0efa5b2784e56b7a63f2802753f10.pdf?index=trueIn 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_off00008f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F04 5136 bytes
SHA-256: 96799f6ad1e389f58efb520e17aac6c3b9e4c3e1141caa547d43ef3a820f7655
font_01_sfnt_off0000a09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA09D 10140 bytes
SHA-256: 48ee2de2662c8db14a454af305f7e6305c13b778f0c2e2b5bbfeaeadb74bb003

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