Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd08b121738da077…

MALICIOUS

PDF

39.4 KB Created: 2020-10-31 20:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d1bd0cad13c290a9c4acfdf49c603c4f SHA-1: b364c45a18d596e87817228d0397d59383bba943 SHA-256: bd08b121738da0777567d99205806750380d7b541dfa16ac24829270c5e214c6
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/123?keyword=synthesis+reaction+example+problems In PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/dokugepofajexazeg.pdfIn PDF document text
    • https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/5069019.pdfIn PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/tunexajibutajatebis.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/6983359.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/38d532d507560.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/tabaxudinirafi_doziju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/kme_knife_sharpener_accessories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8112/8897/files/zujufobufuluso.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/gulifovoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91516ef8-6a17-42d6-a5a1-ffcc57680330/new_adult_film.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7896/5166/files/analytic_geometry_grade_10_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/how_to_play_kingdom_hearts_in_chronological_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c836d8fc-e7e8-4204-947a-546cbedfd920/masixalisusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8989/2776/files/36467941755.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/fuuju_hime_-_cursed_seal_princess.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_off000059d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D0 5584 bytes
SHA-256: 27e6f5221a6de9817beaf93c1eaff3142520b797458ca58c01955d82132ec051
font_01_sfnt_off00006caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 10452 bytes
SHA-256: 17bc08a60ed7bd630350ed6047776f308b1c7f146a9ca70a22b63ac8baa2bedf

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