Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ee12629c771bf3…

MALICIOUS

PDF

56.9 KB Created: 2020-10-13 21:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d4acd7c7387a500dde7fbec7f4079fd3 SHA-1: 7c8537bf4fe3cd2f7b4fa11485f2c16bc5cee9dd SHA-256: a5ee12629c771bf33af189b5fe90b89e73d3b3ecb216822096966e62eadacbd1
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://ggtraff.ru/strik?keyword=accounting+book+pdf+class+9 In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.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/09ff6292-fcc2-4675-a66f-d79e37357897/pexolaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e84c4d-b800-43eb-86fb-d56e9414a489/ribofabatokokajefomisex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f808d6-1868-4361-9979-9def97045fb7/boropedutar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f40c2f-a920-454e-8be1-16442a031e84/65807256932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4051be24-e723-47fb-909d-43c5158ef061/lizoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102ffe62-27aa-45c1-873a-4194d95a8f17/69668195729.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 5576 bytes
SHA-256: f680df20447e7525f1763c5f09124c29f17eb3660d6aaceda1be22b140960d3c
font_01_sfnt_off00007f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 11752 bytes
SHA-256: e602e04cb9244dcf8eaf4d5b6a52ca8f32dc9d43e02fa6653d51d73ea0eed4d2
font_02_sfnt_off0000a541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA541 15368 bytes
SHA-256: 8785371ffc86c77e187a8cf949e6a3fedbd9de4d8ecb3077e82704d7015a1de8

Open this report in the interactive analyzer, or submit your own file for analysis.