Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8646a159b3cb3f…

MALICIOUS

PDF

34.6 KB Created: 2020-11-04 08:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: bad0eb9104c57b94c25239c7a3ff34e0 SHA-1: 23d03ce8481e2b31caae4b17d42a58ac15a6decf SHA-256: 3b8646a159b3cb3f2f598f818f07d825b2c458ce382365f496dd2fc76b308b14
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/aws?keyword=zombie+addon+bedrock In PDF document text
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/9f5c9.pdfIn PDF document text
    • https://raxitiladiruwek.weebly.com/uploads/1/3/4/4/134487911/2195313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8b96747762d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5fa1e33904032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_5fa215595fdd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5f9c107ce1e45.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/zaxawetawupo/xodonowotanoreb.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/14904204105.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/lost_walmart_receipt_need_to_retrieve_it.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/bouncy_basketball_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/showbox_is_not_working_november_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/23506997970.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/the_holy_spirit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nazedumaduwoxap.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/35894529456.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_off00004a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 5036 bytes
SHA-256: 5e4eb17391a8d93968a7d2ace1b9ee1bfcb41ff750e5260f93b61b6fbd74b921
font_01_sfnt_off00005b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A 10248 bytes
SHA-256: ba77e7cbdfe472fca2563338f0c5ca4178b93e249bc13d78672348eb9b4972d5