Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b9ca3c37be102e…

MALICIOUS

PDF

44.1 KB Created: 2020-10-07 08:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c579547756ba9fef2719c2c18ae85c12 SHA-1: 8c7a2bdde0c3cba18da5962fa9152197753a01bc SHA-256: 40b9ca3c37be102e70bf9197b0419853d13d0fa1676585e556d6f86ac5d16d12
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://gettraff.ru/strik?keyword=aegisub+karaoke+effect+download In PDF document text
    • http://xuzepo.stchristopherswooster.org/uploads/1/3/1/6/131606834/4618401.pdfIn PDF document text
    • http://files.pur-pro.com/uploads/1/3/1/1/131164439/f8da57063885f.pdfIn PDF document text
    • http://satagug.ashleyscleaningservice.org/uploads/1/3/1/3/131379394/35ae3384.pdfIn PDF document text
    • http://zamixanun.sesamecorner.com/uploads/1/3/1/0/131070364/rodufepudemesi.pdfIn PDF document text
    • http://riveje.sanikiluaqfreezer.com/uploads/1/3/2/7/132710797/dijitilobamaju-lonalotus-sofepuwuwuvede-lofedivirozeduk.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/nodasodizuninuzovotekikis.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/99343193711.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/jepudurexikirof.pdfIn PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/kedakugi.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/1/0437/2417/7560/files/52982918703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1805/0472/files/41353999960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/prometheus_rising.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/68580835707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/awol_at_guide_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/michelin_latitude_tour_hp_reviews_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2926/1219/files/the_darkness_that_comes_before_audiobook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/91902308330.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5237 6664 bytes
SHA-256: fe506145809ab497beb631b6ea1bf3b1709ec45539d18c9803964ffbec917981
font_01_sfnt_off000068b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 5472 bytes
SHA-256: 11fbdee676118296962cd9c087a6c63a1b7f06957f4a391f9a2097908c1137df
font_02_sfnt_off00007b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B78 12508 bytes
SHA-256: 32f861c9b7511649073970d8bb6ca46add685665a5f34ffbe5ddb186bbb113a7

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