Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd41cfc336d00a8…

MALICIOUS

PDF

46.0 KB Created: 2020-10-13 12:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 38ac9ae692d4d1d7d5985cc1f4f9dac2 SHA-1: 6549ac7e7ea3cd97ba1470dc762f31ecb824d2bf SHA-256: 1bd41cfc336d00a8e8ea2381da4e0e89d42038d07ab5aeb90b70666aa727c60b
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=android+tablet+photo+editing+software+free+download In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://site-1041212.mozfiles.com/files/1041212/someroja.pdfIn PDF document text
    • https://site-1039752.mozfiles.com/files/1039752/3281213162.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/31043676485.pdfIn PDF document text
    • https://site-1043438.mozfiles.com/files/1043438/82414478883.pdfIn PDF document text
    • https://site-1042103.mozfiles.com/files/1042103/98234226240.pdfIn PDF document text
    • https://site-1043760.mozfiles.com/files/1043760/8971723611.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/8844943651.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/1/0478/4055/9263/files/18538254308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/phrasal_verbs_for_bank_exams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3820/4053/files/umbrella_academy_apocalypse_suite_collection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/fuwami.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_off00007588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7588 5524 bytes
SHA-256: a1553521f175dd55e6f344de1e714d5492d6a5c4e108ef9a6b2f9c8297b36fad
font_01_sfnt_off00008856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8856 10192 bytes
SHA-256: b9b4331be092cd780c0db8c7791a0ab3b3ff8cc85069fd91f34613c46c6f61d1

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