Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47317fce02a4d5d…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 19:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6e6f4a0bb6c1f1d55866f0203f61943a SHA-1: f4502e41a9e52592e71c549f47cf8b0e7b6fa990 SHA-256: c47317fce02a4d5d77cc80c5048aad040884d4c95b2df7ad01b88616c3578b87
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=leather+tooling+alphabet+patterns In PDF document text
    • http://vubadovu.fyldecoastplayers.com/uploads/1/3/1/6/131606490/ae3aab744f.pdfIn PDF document text
    • http://files.flagshipduluth.shop/uploads/1/3/1/1/131163914/3954245.pdfIn PDF document text
    • http://files.buangor-ps.vic.edu.au/uploads/1/3/0/7/130740442/xonifobepumip.pdfIn PDF document text
    • http://files.thealilife.com/uploads/1/3/2/7/132740905/85b91c0be.pdfIn PDF document text
    • http://mamuwuxex.journeytobalance.net/uploads/1/3/0/9/130969472/97f986.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/1/0483/5269/0327/files/anna_and_samantha_martin_on_shark_tank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/qubool_hai_june_24_2015_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8068/8836/files/taposewotiwep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6940/2009/files/viwike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8733/2253/files/62660653943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7528/8732/files/my_hero_academia_episode_49.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3454/2748/files/digital_note_taking_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/kofoxevoxezap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3333/7249/files/bozeroguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9422/8126/files/exact_values_of_trig_ratios_for_special_angles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/jelly_filled_donuts_pokemon_recipe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 5164 bytes
SHA-256: 4c7ea455c6765b19ffa58e58bb3a0da7b1a45cab2437a84fc3acbe6ceedd9766
font_01_sfnt_off00007338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 10028 bytes
SHA-256: bcd6424b676466787d46c0d8c22b3f0b031bb5f0a476949113cd23f9d538598d

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