Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98992cf8e5b7729…

MALICIOUS

PDF

44.7 KB Created: 2020-10-10 05:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4905f912b088514677a0970a126bfdc1 SHA-1: 13f8a6ec2fe85a87ad400664e14e871595f505c6 SHA-256: e98992cf8e5b77297f426051c6efd317c87efc4366c79adf16f188fc8c3ad873
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=pathfinder+bracers+of+the+merciful+knight In PDF document text
    • http://files.childrenofthekingdom.net/uploads/1/3/2/7/132710589/1379537.pdfIn PDF document text
    • http://files.homesbybellamae.com/uploads/1/3/1/6/131606347/4819375.pdfIn PDF document text
    • http://files.gracechurch-pcusa.com/uploads/1/3/1/8/131871590/1409897.pdfIn PDF document text
    • https://site-1045312.mozfiles.com/files/1045312/pexunajite.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/nurafulonupusabu.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/1/0483/2880/2468/files/10533572486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/50419096644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/98417674803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/abraham_agreement_with_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b3fac8-b38b-4943-b32c-ef054a263252/rubavewowoguxelatoxit.pdfIn PDF document text
    • https://www.youtube.com/watch?v=Zjt5oCmPvPIn 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_off00006625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6625 5640 bytes
SHA-256: 31df43db73e686e7a33b16f7350158b6ce43ea982509c5fbdc2bdbee1bbcd37e
font_01_sfnt_off0000792c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 14636 bytes
SHA-256: cea9a1a0d22e603403b362256454eec0472e053c5e70ce7dfaa1adf6538f0418