Malicious PDF — malware analysis report

Static analysis result for SHA-256 318c22d4faf966fa…

MALICIOUS

PDF

55.4 KB Created: 2020-10-11 17:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 19cd5363c8fa35e267dc621c1633a613 SHA-1: ea2a28c9abea7627ef10549a1817eb05587bd0e3 SHA-256: 318c22d4faf966faa1d086ac74556d8a74864002df9ae869c7e1a69782c9578d
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://cctraff.ru/strik?keyword=zona+ganjah+ninguna+como+ella+descargar+mp3 In PDF document text
    • http://bawuxap.stageelf.com/uploads/1/3/1/4/131437601/218add58547b800.pdfIn PDF document text
    • http://files.doublediamondequestriancenter.com/uploads/1/3/0/9/130969053/7905d3b.pdfIn PDF document text
    • http://puxivatis.maplestconstruct.com/uploads/1/3/0/7/130775918/lezegewezeju.pdfIn PDF document text
    • http://fiwiker.maid4uae.com/uploads/1/3/1/3/131383761/2b6632626789f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85a8d85-d2f3-47fb-b030-884256b62b0c/kaferidosuvufizad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37764a5e-07f9-4d24-9490-2c9b04add031/41289455874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63764555-bad3-430e-9950-94b5eec85034/52175155564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855d49ab-10f1-4985-8ed5-432917099ad2/32253318465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffe03ca-52ca-457c-9027-cb13cbe2c32a/jopisojip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4302833a-f1d5-4896-87f4-ced08a87a7a2/bavanatixusararevokew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8d0ed4-a87d-4a5c-a6ce-0340e9e7b83c/xakamixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a69f7fe-648a-4df0-a720-0961489786ab/refupibefumosokilonuwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e7d52c-2ff4-4f7b-a920-d9921fc36f96/xerasexum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1146/9220/files/jcpenney_price_scanner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/vejedewagobebagiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/ruxeliborigozugoborefepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9424/0151/files/mysql_aggregate_functions_in_where_clause.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off000072ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 5684 bytes
SHA-256: b58f3550f07c28465b569fe79d55103885a56609a8b07de9944b79b75a263fd1
font_02_sfnt_off000085ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CE 2128 bytes
SHA-256: 1757e9b21583d324d419cc79f07ea3b967ec962ebb57f4057bcf2fb90cc0d392
font_03_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 11688 bytes
SHA-256: 60a5eabba1ba8754922ac4738ae59177bc91226729924a0e161e47e5e9684610
font_04_sfnt_off0000b5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FF 17012 bytes
SHA-256: 2b52c418938a2ae25a757d0762f23cb7812f23d2ced804d85a16cd5db29bdfe3