Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5148c4716c926…

MALICIOUS

PDF

38.2 KB Created: 2020-09-22 13:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4fe2b6bd0b32f57fd9c95ca6b700a38f SHA-1: 2aca7fde4c4c026c2ab116baa14c2c7ad8e222ac SHA-256: 15b5148c4716c9265461f19966accd4d8b7b0af051a4dd0be22ad81ff90fcaf0
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.link/wix?keyword=angry+birds+go+mod+apk+1.4.0 In PDF document text
    • http://files.berquistministries.com/uploads/1/3/0/7/130739232/ruwagelarado.pdfIn PDF document text
    • http://murox.missiontrips.livingwatersspanish.com/uploads/1/3/0/9/130969264/5c46bfd.pdfIn PDF document text
    • http://files.flatandfancy.com/uploads/1/3/1/4/131454696/jirepumawokapo.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/1/0433/0687/7080/files/31931154882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8245/5709/files/nenotapovirijusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/xemezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/27553271776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/8813091092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/baxaruxepogevebojus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/sijafipigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/jazeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/6002375338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/8318/5575/files/57630810731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/2856/9253/files/latedabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/liwifejemulepadojuz.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_off00005012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5012 5856 bytes
SHA-256: d774d4a32350e2a221bc61c619cb394731ab32926accd76c8c64e33b533d1bad
font_01_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 12596 bytes
SHA-256: d996413b0e4ff22ed94c161f512b4f0b20d8626ace658ba3ad960ccda38330d0

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