Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb1827a0dd04059…

MALICIOUS

PDF

43.4 KB Created: 2020-10-15 18:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8f3b5cfc29200bb6843c1135d77caf87 SHA-1: f9c4f6ed605c191ea54a9edfff8319c5bcffb7dd SHA-256: cdb1827a0dd040596f09387425ffa403b54d446ea735d88f968833ff1b062523
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/123?keyword=solving+using+the+quadratic+formula+worksheet+pdf In PDF document text
    • https://site-1041208.mozfiles.com/files/1041208/gatifawuxijawezugopo.pdfIn PDF document text
    • https://site-1048265.mozfiles.com/files/1048265/rujale.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/95715710888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8711651da4c.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/vusigo-tulurol.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/6089907cad1d787.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.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/1/0441/2506/1272/files/nimotupiwuvumojotilesofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3699/7792/files/38317337744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3866/1534/files/the_spoils_system_is_sometimes_called.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/the_mental_game_of_poker_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8281/2066/files/spider_man_ps4_pc_release.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7779/3960/files/konedorupika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f056c421-bfc6-4e41-b6d5-2405d8c51cdd/61954491970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f223823a-33dd-4863-b6b6-b8210d01eb3f/6476645683.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693E 6012 bytes
SHA-256: 30fa2de861bcbf0d84efe7c1185a3c0569578d9f7178c4c49458c971f5a59fba
font_01_sfnt_off00007d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D99 10260 bytes
SHA-256: afcfc598ba2e95d8d0244896ca427f97c05236e25a06983e046dc812ba5bd121

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