Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3caf16e4b80b868…

MALICIOUS

PDF

43.6 KB Created: 2020-10-17 00:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f8127097652b635f326cd41b140c7a9d SHA-1: f79c7c2f45e3bb5c517561474368a5f5963ac87a SHA-256: d3caf16e4b80b868419c292d23b07d9aa70db49b1b1fbd68bfeaa373d608d030
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=continent+and+ocean+map+pdf In PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/3245708.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/1564899.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/tubabubexevuwefobate.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/4223030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/207a24cb-aaa4-4869-aef6-a48345e93187/dumamiramibide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f83376-1e09-433f-830a-8b68413afce0/xokametef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c89c500-a16f-46b8-a7bf-de44b616b393/88391030830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed6ea94-1487-461c-8fe0-b76d7913da1b/19971342158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af89221-f79c-4a8e-a0df-8fd8b8c06064/9600570315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1189/9044/files/pesaginukukas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4316/7651/files/clasificador_presupuestario_2019_ecuador.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/red_piebald_dachshunds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8843/6118/files/the_adventures_of_tom_sawyer_planet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7622/9531/files/dezatiginepiroboja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a78378-2efc-4a29-b6b3-5f9a796cb368/8506521829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76589d07-f3b1-416f-aebf-1174875f8321/55905339589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3ead0d-f155-4e68-8e41-fb3b024d919e/93742044339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470f9aa6-dbe1-4b8a-87cf-a4ab292e156f/wexakabapiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823a87e3-6ed0-46ee-ae29-f14c1a5dee7f/99555458960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a0430d-826e-44c9-a027-827faf219229/fuvesofezubak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3862042-fcfc-4677-8979-69269fe38a77/64798575046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d726180f-26f2-424c-9511-9064661b3fbd/13947451730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8976/5561/files/northern_short-tailed_shrew_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4348/6358/files/paxudagane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9374/0705/files/94506121057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2329/0527/files/mens_wide_leg_pants_pattern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/basics_of_economics_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 4808 bytes
SHA-256: a5ab235274bbc8a3fa7e34ec66036ce85587ebe39612033d428a0069d1851ac6
font_01_sfnt_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 10172 bytes
SHA-256: a28c385b864a485a56fe024cb77ba36982526d5a25c2736b533d1fbb0b09ce8d
font_02_sfnt_off0000926d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e