Malicious PDF — malware analysis report

Static analysis result for SHA-256 f238da44f0ab19bd…

MALICIOUS

PDF

43.6 KB Created: 2020-10-27 18:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1b7d26ebf4baa3ec4b89a5efa6fa31de SHA-1: bf903a58b8d428ec609b590ebe4534c193139b22 SHA-256: f238da44f0ab19bd652a78842fb2e5e1a3b94ff9fa133f6a174fafeaaba129ae
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.me/123?keyword=qc+certification+corp+of+engineers+campgrounds In PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/xupipib_vemopunakigagiv_muguje.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/9905354.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/3376590.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5f959313910c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5f8cab9188b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5f97fa76c9bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f8f28b668708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f918e787593f.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/1/0431/9418/7933/files/zumifumipujug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2307/2921/files/tom_green_county_judicial_records_search.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/city_of_longmont_electric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8693/2894/files/jbl_boombox_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d2b4ea-cd31-4bb4-b92a-2fffae38cb52/dolide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe793e0-b961-47e6-a17b-d51e95a31d77/5858710690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a33b84-87ef-4242-a422-30ba1e23835c/29773868502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2af440e-bb49-4374-8477-9575b6d7f830/33641675274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3db5922-e535-4aff-a7ba-ecaa69225b4a/fikilavimirale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eedaede-e6dc-4c1d-874d-d8338bdd62f5/99717607903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4c3a44-c77a-446f-913b-c93159add079/10820620149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9416/6683/files/famapibijelevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3870/2748/files/40908509425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5478/7477/files/xomularikib.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_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5388 bytes
SHA-256: ee9f44d7834952a842cd4e1e3d91a0a22a9883ee66d313f8243ac3a4c864fe31
font_01_sfnt_off00006fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 10432 bytes
SHA-256: cf23adce7ca15cea353fca721dbcce1047ee2d57377a18f851c3e0c469df1a07
font_02_sfnt_off0000928a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176