Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3bcfdbb18db1f6…

MALICIOUS

PDF

34.3 KB Created: 2020-10-09 09:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b2a26f589959b3aea339deabc72ec5cd SHA-1: a97ae4e1bb5c2213e61df7627fd5fbd97475c28e SHA-256: 3c3bcfdbb18db1f65a8f9c725b0bfe5ca828dacd4978b72117fbe47c090e64a1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=btd5+unblocked+games+for+peasants In PDF document text
    • https://site-1041609.mozfiles.com/files/1041609/57147709207.pdfIn PDF document text
    • http://files.deannewilsted.com/uploads/1/3/1/8/131856079/gemilodal-bujopomuv-dagolovanoxi-fuwatapegozape.pdfIn PDF document text
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.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/1/0431/0073/3596/files/kajavusoxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9811/5737/files/in_what_ways_does_a_computer_process_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/origami_owl_chains_tarnish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/yellow_perch_in_lake_winnipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e039eec-efba-4b2e-9546-6337e5eda26a/mijozeduxuxamemuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d560f95-f35f-497d-8e3e-a9e90604299b/9696359837.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_off0000461b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x461B 5852 bytes
SHA-256: 12bd0dd1f83435d0b8d09e7ff270ef07b2d9a767c5035244590518c2c759bba6
font_01_sfnt_off000059f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 10212 bytes
SHA-256: c4b6ddd87adf18cc22b9cce4a34cebb2d6b4c4b4e31c10d209c25f52bd6954de