Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da635490e790417…

MALICIOUS

PDF

50.2 KB Created: 2020-10-07 04:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b8dd8016335afe53f947299e90586295 SHA-1: 5c5c2360487d84fd3c3b7a69b0116f6d0ae69b27 SHA-256: 6da635490e79041743e7cda5694c5f7e7cd198f55e8530b4d17bb1e421465973
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=australian+slang+quiz+pdf In PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/savujifoze.pdfIn PDF document text
    • https://site-1041587.mozfiles.com/files/1041587/41208943781.pdfIn PDF document text
    • https://site-1042976.mozfiles.com/files/1042976/8424436696.pdfIn PDF document text
    • https://site-1040140.mozfiles.com/files/1040140/95619213006.pdfIn PDF document text
    • http://files.post-press-systems.co.uk/uploads/1/3/1/4/131437766/venagosefimanago.pdfIn PDF document text
    • http://duwapumuw.newbornd-esign.com/uploads/1/3/1/1/131164312/3135566.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/17892228090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8471/files/quran_arabic_english_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4183/9514/files/fijipafunemabugeruren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9880/2838/files/5396870007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/89219003095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e56b95-5cd5-48c1-bc0b-9e782121b8ab/95785682887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ff9a3a-3fb0-4f15-8dbe-e8ec53657573/jezafobajexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb936fa7-31e0-42d5-8405-9b32c352442b/xuwewizubowolasisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfcdd9d-a16c-4f85-9a25-bbc3ea35e01b/falogofiborunoxiw.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.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 5028 bytes
SHA-256: 52db4264b9d03ab4b9925aef52833707c48ca1ecd66f283c63063e2a3a658fb3
font_01_sfnt_off00007a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 6068 bytes
SHA-256: d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd
font_02_sfnt_off000089df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DF 10420 bytes
SHA-256: 91093a6624d92f76815e782b0f91d27c5009565285f359c57c5328c0e8fdf255
font_03_sfnt_off0000ad93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD93 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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