Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a33a14b6953ae7e…

MALICIOUS

PDF

42.0 KB Created: 2020-10-09 11:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 213645e606d8700c3373d7a77bbd6bc1 SHA-1: f0633ffd579da752f708588a8f473d4a29069ac0 SHA-256: 0a33a14b6953ae7efcea639ff4e151e619e67efd5bb0658b835047a8b7f9f4a7
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/strik?keyword=penndot+license+renewal+number In PDF document text
    • http://files.noorulhudaboutique.com/uploads/1/3/1/6/131636774/d187699ae0.pdfIn PDF document text
    • http://files.eatyourpoem.com/uploads/1/3/2/8/132815791/3017542.pdfIn PDF document text
    • http://files.jenmalibu.com/uploads/1/3/1/4/131412362/8693147.pdfIn PDF document text
    • http://files.mariasummerscakedesign.com/uploads/1/3/0/8/130874120/7000048.pdfIn PDF document text
    • http://files.saraashleybeil.com/uploads/1/3/0/7/130740264/c0cd3e7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1821/0458/files/pumamalonisewaxatij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/jigufoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/radivemupofuturora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9371/4853/files/tewofajimazako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/25834201164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7905/5000/files/tifozadozaxuxaloligofof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0162/0898/files/xogidininame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3015/3885/files/96467635660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9636/2148/files/37131415253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa232ce5-68bc-4b36-ad9c-ec9402528e5a/83095806858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a6547c-0247-4a1f-9c8d-175169400114/97892551249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a050a1d-1ef6-43de-a3fa-7a10f2920ff3/mobaranufafot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d5ec11-6351-41d9-9fe3-2ddc868a5aae/98961539650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c0eaa0-87a6-43a1-b2c7-e09ea18f7aee/nakitisirebo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000586b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586B 5200 bytes
SHA-256: 0d23e4d2a3ee15d8a65f6f8855cc12b2a5a0f951b1e5a91beb72d2f83ab0137e
font_01_sfnt_off00006a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 10152 bytes
SHA-256: 167ead29f923a8d4166cf056ac70c7971740944d8e8f5805f02e267652e1a78f
font_02_sfnt_off00008cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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