Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab73cbce06a329b…

MALICIOUS

PDF

49.3 KB Created: 2020-10-30 15:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d11235aaf74b6f619bb71b248e65c0fb SHA-1: d384a4f867cce376ea23213aa5341df847e3526a SHA-256: 7ab73cbce06a329b5036210a1193348f205fce19dce7ebf72ae66fb8e9bb96eb
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=newton+south+high+school+alumni In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f9b6bdf30c09.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/7535962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5f93b70b7f051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f892de10ddef.pdfIn PDF document text
    • https://xubikorapaja.weebly.com/uploads/1/3/4/3/134335605/bc194b63dfd23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8841fad9086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f989f5da2bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f93080bea9b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f96f6865049a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f8fb82423a96.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/lulelepese/pdf_editor_edit_text_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/44846813469.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/danimojajutuguxosowor.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/1457414643.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/63817283341.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_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 5180 bytes
SHA-256: 593a6a8ad6d4c70b62913ebfbdee61838b5adef1a04585ec87c8b6737d7dba43
font_01_sfnt_off00009467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9467 10692 bytes
SHA-256: 31f6c8df88aca2a1dfd4e0e86a39f4214ce530f43097b82cb5b11a6655f4b178