Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c426c5fcd43183a…

MALICIOUS

PDF

36.6 KB Created: 2020-10-10 07:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e9a1e1d7b36262bef514300842e289af SHA-1: 296bedc3b1456acdcf0e2373cae4a857594a8ed2 SHA-256: 6c426c5fcd43183af4eb4e8dfd864d2f60ddbde632aa8434e4098a4fa5036139
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://gettraff.ru/strik?keyword=chappelle+show+racial+draft+gif In PDF document text
    • http://migonem.americanradicalmovements.com/uploads/1/3/1/4/131438741/mirel.pdfIn PDF document text
    • http://files.ccjsermonstorage.org/uploads/1/3/1/6/131637419/figonidusip-pixafevijomu-zerigew.pdfIn PDF document text
    • http://sugopi.msgsocialstudies.com/uploads/1/3/0/7/130739919/2740a7d31ab.pdfIn PDF document text
    • http://files.engineeringshock.com/uploads/1/3/1/3/131382491/2866304.pdfIn PDF document text
    • http://silefe.jihyunhong.com/uploads/1/3/0/8/130814687/zizeginomuxavegi.pdfIn PDF document text
    • http://jimol.1770-agnes-water-celebrants.com/uploads/1/3/2/7/132740606/554101.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/1/0433/4904/9494/files/map_of_ancient_egypt_worksheet_colored.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1463/8744/files/25261764014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6504/8733/files/19459534871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/osu_custom_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/vegozoloxarepejuwinam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/5530/9977/files/36601664348.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_off0000503a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503A 5416 bytes
SHA-256: 146b51abe219346d733a9e8da31e8c7c03fdc5d168a2ec0e06063d343c1fd860
font_01_sfnt_off000062ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 10288 bytes
SHA-256: 26b8a5f51b7c4a7f53e22a6a74f1eb786489537c4acc5fe3af33e9bcb225bea4