Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfb6fbb2858c432…

MALICIOUS

PDF

40.3 KB Created: 2020-10-11 03:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 47168916c7b8f31c3f937d03f9515125 SHA-1: f6229148a756ad06e99240779bb803abd392ed0b SHA-256: 6cfb6fbb2858c43208e1fe31d83057861dfd45188d353990a5252775abdfdb34
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=printable+graph+paper+customizable In PDF document text
    • https://site-1038303.mozfiles.com/files/1038303/tiwuzamidifokex.pdfIn PDF document text
    • https://site-1038867.mozfiles.com/files/1038867/19399266921.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/mabezitugebirigusapokon.pdfIn PDF document text
    • http://rugap.nimblehillbrewing.com/uploads/1/3/0/7/130738914/tobujeta.pdfIn PDF document text
    • http://files.kerrythibodaux.com/uploads/1/3/0/8/130814010/dikosu.pdfIn PDF document text
    • http://files.castlesnshamrocks.com/uploads/1/3/0/8/130814011/4836268.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/1/0483/3427/4723/files/zelda_breath_of_the_wild_guide_book_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/3000_watt_power_inverter_with_battery_charger_and_transfer_switch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3692/4826/files/chestnut_hill_academy_washington.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5327/7088/files/porter_cable_radio_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8982/6460/files/two_peas_in_a_bucket_phrase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7f660e-8518-4a44-9503-a5a0501e0369/99221690416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574305b7-74db-4da6-96ff-e352c12a3a5d/71382792194.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_off00005f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 5536 bytes
SHA-256: 09fbfd4fdfcee8fd4db6b4f79a0f61ed1522c88c8aee36b9924e85064a64127a
font_01_sfnt_off000071e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E3 10172 bytes
SHA-256: 31a1430c292fe0eaac45683aab653c0c0a89fc0ed518679f822e0d723021b3b6

Open this report in the interactive analyzer, or submit your own file for analysis.