Malicious PDF — malware analysis report

Static analysis result for SHA-256 451139052fd0b373…

MALICIOUS

PDF

35.7 KB Created: 2020-10-09 06:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e8db0b84d81433d8fc6f42145b29d2c5 SHA-1: 28e0732f846af1862bc35ba855b7588799263bd2 SHA-256: 451139052fd0b373725e1da6dede9c6bb7d7625126f18610c4b99341571593a8
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/pify?keyword=bulk+acrylic+paint+canada In PDF document text
    • http://wojogof.lonestarfloor.com/uploads/1/3/0/8/130814687/sowilojijelapo-wawoxe.pdfIn PDF document text
    • http://files.carpetcleaningaffordable.com/uploads/1/3/1/0/131071262/daff9af7e238.pdfIn PDF document text
    • http://ronemu.blumoondesignsjewelry.com/uploads/1/3/1/3/131381679/gozuzot.pdfIn PDF document text
    • http://xukej.taketimeforyourselfmassage.com/uploads/1/3/2/7/132712324/femiwezajuwa.pdfIn PDF document text
    • http://sukiwi.hotdoghols.co.uk/uploads/1/3/0/7/130739430/wubumezijof-tulemofufax.pdfIn PDF document text
    • http://files.brokercontracting.com/uploads/1/3/1/0/131071137/niwolakap.pdfIn PDF document text
    • http://rilut.thesockmafia.com/uploads/1/3/1/4/131452903/b55327a9fb009fa.pdfIn PDF document text
    • http://files.aschnell001.com/uploads/1/3/1/4/131482832/xalibaxowobumonupuli.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/1/0496/6596/6231/files/writer_today_3rd_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9006/0473/files/baby_sun_conure_for_sale_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/thunder_gun_express_elena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/maltese_puppy_cut_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe876d8d-2926-42c5-b782-8fbf552abb7b/26358856240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55ce43f-25e6-4b6e-856f-174492654c16/xikogugeniwadigogekalud.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_off00004aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA1 5104 bytes
SHA-256: c24d88a01dea431d0c235c7ef3fb4afe6f6ac0a0a4441fff10827e13a0ce518a
font_01_sfnt_off00005c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 10676 bytes
SHA-256: cc6a197a47cba1ba26a35a6d60c4b78ef91bb046b6204dabf8d35f6e9c27f023

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