Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8014a1fcfcdccd…

MALICIOUS

PDF

39.5 KB Created: 2020-10-12 05:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee5b9ffc05742891f16c1fb94c071ef1 SHA-1: 13f8bdaf5b43a16a15c0dff247dd4a94c0387b13 SHA-256: 8b8014a1fcfcdccdd143965e732ae7676457713d78dc946acbf77186567934e9
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=ti+36x+solar+scientific+notation In PDF document text
    • http://files.marquisjewelers.com/uploads/1/3/0/9/130969428/a9ceddd2.pdfIn PDF document text
    • http://gilegibox.saisonfoodservice.com/uploads/1/3/1/8/131872203/622431.pdfIn PDF document text
    • http://files.hittersbbq.com/uploads/1/3/1/3/131384432/migafu.pdfIn PDF document text
    • http://files.ingridasanchez.com/uploads/1/3/0/7/130776726/5531539.pdfIn PDF document text
    • https://site-1043037.mozfiles.com/files/1043037/gepijamabebexasumew.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/14989123125.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/1/0433/3459/8809/files/the_ultimate_rpg_character_backstory_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5800/3607/files/40340828164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3296/7830/files/lokufovajekofitajomebe.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_off000054ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AB 5208 bytes
SHA-256: bdd910635cfa96b9e4837ee8093719ba25f4a0cbc176606e0aeca121b77433e7
font_01_sfnt_off00006630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 1404 bytes
SHA-256: 0056629fb316f1a678be380e4288c852b73d79dad1539f98ffd070120e17135b
font_02_sfnt_off00006dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 10360 bytes
SHA-256: ffec177e0a7cdc730dbf7418d6429785e5e3db2199ff1a5d316fcd0c79cfcf58