Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6c5a7932dab07f…

MALICIOUS

PDF

41.7 KB Created: 2020-10-13 12:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 69fafc51f61577c627508555fd6770fd SHA-1: e6abe81791270a1208492ee075f37526a2a7156f SHA-256: 0d6c5a7932dab07f38f6c7d2d27172e441769b8c28fdd7eb56e2fe4a42a6b9d7
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=wallpaper+lucy+fairy+tail+android In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7de07c-f285-47bf-8a12-5e3029152110/6057442277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b725a162-2279-4e8a-8e48-0e6542a0b0b5/89466615283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c8898f-750e-47bd-bf9a-57f3151aff1c/zokufefivifol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2431c3-c08b-4f3e-a6c1-70965f6e8560/lapakizuvoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/omega_2_savage_guide_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3164195-1b53-4e44-9517-fc5c0afb5d44/86111440100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12abd69e-ccb2-4f6d-9fa0-d2d5ca18b943/67848447298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f716404-dbec-45bb-8250-9351a379b815/xobegomokorijoselela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81b5f82-18f8-43ab-a33f-db2d6e93d89d/65967524218.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_off00006509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 5088 bytes
SHA-256: 1fa0dd0b34a47b85ca84a8124a6b850ed678aa8487d8fd0dcb8c83ac5c3a814d
font_01_sfnt_off00007677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 10480 bytes
SHA-256: be96b53b6cc0f089b33c6ef7289766ae44da955cd55d03a7c437d89356b895da