Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f78cfe03ac7356…

MALICIOUS

PDF

37.0 KB Created: 2020-09-10 14:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 27433df56ebe09b99c500b1a53f15ed5 SHA-1: f9fcf290a956cca6a39ee6ec2f29bb0e50b2edb3 SHA-256: 74f78cfe03ac7356d401182999d86e65f884f29596344896996de37efb48b8c5
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=nsw+whs+incident+report+form In PDF document text
    • http://fokozejo.lightningsboxingclub.com/uploads/1/3/1/8/131856543/4ecb3b5899.pdfIn PDF document text
    • http://guxaxeb.maestrodonappert.com/uploads/1/3/2/3/132303354/kajakozokezan.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://static.usrfiles.com/ugd/1da05d_7acdc34497384bcd91389b6cb1163b61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69695d_8d7cdd3e5bb4458cba8a1133c17a07bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ed59e422ec054ee081e18de4f03e6c5c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/57309510298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/85141366280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3814/4672/files/200_pound_beauty_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/kadaxaworenuwezero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/33040564249.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dd040_38e00b18e0054c5cba10091b8cbce3df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc777_3dfb1ed3d36a4a9fb8ba40276af4e943.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b5dd9_e683069a219d47a78f9d96303dab6fc5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/15cd4d_d9ccedee020f4d70bd6244057f5a80a1.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_off000047b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47B9 5000 bytes
SHA-256: 4d07a8ec550d8c7b7b89b15ddc88d1f2ab5f1fd9c6be411d329f86229cb5930d
font_01_sfnt_off00005896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5896 9552 bytes
SHA-256: c73c886c9e9efb556e0a7a1bba33be356c127eedc29e488a55f909878e4b8111
font_02_sfnt_off00007918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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