Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2894b422c97858…

MALICIOUS

PDF

36.9 KB Created: 2020-10-11 04:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 280a7d5138c1c058fbf47d82b36eead5 SHA-1: e11005f101b3d46d2e85e435c6d9459902c053e2 SHA-256: 2b2894b422c978584d789f669df56e49cdc06b2047151fa051a5913b3df17a4c
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://ggtraff.ru/pify?keyword=ph%252Fpoh+worksheet+answers In PDF document text
    • https://site-1043332.mozfiles.com/files/1043332/14713110603.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/jefikaxi.pdfIn PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/xutezidosiwubajof.pdfIn PDF document text
    • http://files.lagrangeauxloirs.com/uploads/1/3/1/3/131398194/porizovopepoz.pdfIn PDF document text
    • http://xiseti.melissasterry.net/uploads/1/3/1/0/131070146/lokapepiseko_rorosobunama_tujejatuwop.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/2c4ffcc0-1192-4f25-a3ef-763e785f9f28/72173324018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7a5ada-61cd-4fb2-8f99-d400392c4053/57288067405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4053c3-b834-4610-b51f-f5b68ec7ce92/24457057215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d94c384-7acf-4fba-9011-62178c6bbc26/bibefabilovixag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881b8ec7-b1ed-40b5-89e9-4c058c4ab858/8244402829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1388/9960/files/dapisefema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8338/1914/files/light_keeper_pro_orange_flame_bulbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2956/4062/files/zobik.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_off00005273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5273 5068 bytes
SHA-256: f7f18914639ded0fd57ada28c577b749313ef0fba24bbd9203fd0255381d54e3
font_01_sfnt_off000063c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C1 10304 bytes
SHA-256: 229da80501278aa5be8026e03cdcd6b01f9c677570db78bb43da67af0fc9d150

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