Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae732d4362bf54fc…

MALICIOUS

PDF

42.9 KB Created: 2020-07-31 10:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2594c77caa4efb0c5ad74ef2f9d59c6e SHA-1: bad1d770a603f8cc7e7667c658a0187ade7b4041 SHA-256: ae732d4362bf54fcb5ca56e4ccd6b73f5e56a9a5f398cf6255b136b9f565501e
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://ttraff.com/pify?keyword=small+pdf+merge+download In PDF document text
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdfIn PDF document text
    • http://files.phsdbteam.com/uploads/1/3/1/4/131407958/682254.pdfIn PDF document text
    • http://files.lexingtoncondohomes.org/uploads/1/3/1/6/131606467/zifewibogojonedufeka.pdfIn PDF document text
    • http://files.rmhsperformingarts.com/uploads/1/3/1/4/131454699/5270202.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/1/0438/1864/7709/files/tudidoxoxavedezudiweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/borezeralosugazazupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/14760101328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/vobumuwezuxagusukopedux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/733436072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/51385636994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/79559523973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/16771573526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/92778430245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6290/9335/files/81274028979.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_off0000699e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699E 5036 bytes
SHA-256: 5567b8e4153b72c728d53be3a88bf6ff92dfcbf1311a65ebabd8d565181fd179
font_01_sfnt_off00007aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAB 10552 bytes
SHA-256: 12807fd9ae5c871dcaacbf863c1d40ce243824a07acd8d9cf67baa1138e82c4d

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