Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb416a0be11f1e9…

MALICIOUS

PDF

44.7 KB Created: 2020-10-13 18:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f5b6db21532caa94beb2f6a01b1935f5 SHA-1: de65157d62e9381e4bfb97f0b54bb8e37a476e4c SHA-256: bfb416a0be11f1e9dbfa61ab4ea474122ad31a7875d746accbc801c3b9891ebd
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://cctraff.ru/strik?keyword=photo+to+pdf+converter+app+download In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://site-1040280.mozfiles.com/files/1040280/85083468093.pdfIn PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/dukisarebagoj.pdfIn PDF document text
    • https://site-1038963.mozfiles.com/files/1038963/97651583235.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/tawajufunazamoraxuvur.pdfIn PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/9336251409.pdfIn PDF document text
    • https://site-1043169.mozfiles.com/files/1043169/wuroforowajilopazuvuxop.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/6216281176.pdfIn PDF document text
    • https://site-1039275.mozfiles.com/files/1039275/zipurabowemazuwoli.pdfIn PDF document text
    • https://site-1038684.mozfiles.com/files/1038684/92626718856.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
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/vojoweju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0601/7692/files/tec_9_airsoft_gas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/xivafoweneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/xozoxowibimases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/72261644970.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00004cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD7 5220 bytes
SHA-256: 8b4c28eaf4af07a242768d93d0132d6e1c43e4f27198d63fe95f094be7e8a975
font_01_sfnt_off00005e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 6068 bytes
SHA-256: cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940
font_02_sfnt_off00006e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 9660 bytes
SHA-256: 8de832fbe59891278f968797deb07accf043b9fbdee7edb4d9931e89a64f0d7b
font_03_sfnt_off00008f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8A 16388 bytes
SHA-256: 4189bb5d82d37c3b06c761c00ca3b3c8a7a7312639514cd6a20481e76712d457

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