Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e78bd99a1ca4862…

MALICIOUS

PDF

50.8 KB Created: 2020-11-08 05:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 35b22e738c8ad991544be6ee4e01f4b7 SHA-1: bc1b4912652d9a16217acfb38ff6b8b4bafc83e5 SHA-256: 0e78bd99a1ca4862a80d6252379068c19fcbe8bc8af4ea64c4ef00e9a8efcbe3
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://traffmen.ru/123?keyword=sony+mdr+xb30ex+reviews In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/2d1fe7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_5fa2fa220fba9.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/muvukafaxiboma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xopugup/63741200044.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/90024307006.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/busevunuvepov.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/sopegekawuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/16456516786.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/winslow_junior_high_az.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/corporate_accounting_jr_monga.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/55984947373.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/5577949732.pdfIn PDF document text
    • https://zigusewune733751328.files.wordpress.com/2020/11/fexikaku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5600 bytes
SHA-256: 93c2d2d56ef3ab56255c39a0c66342bfcfd73bd0d5f6130c85d7d4ada8d6e14b
font_01_sfnt_off00007981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 2052 bytes
SHA-256: bfc0904f0f0d07b2dad5b874710802535660feb5301dd45df0a8c923e4b19bcb
font_02_sfnt_off00008237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 11016 bytes
SHA-256: 36382d6b4e3d574e7d18078ff6fa99eee2e5261868df705a51b09e13abbb05f6
font_03_sfnt_off0000a7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D7 16340 bytes
SHA-256: de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff