Malicious PDF — malware analysis report

Static analysis result for SHA-256 89218cea0190a0fc…

MALICIOUS

PDF

45.5 KB Created: 2020-11-03 22:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4ee8b81d429d65d8dba9e3b9c797a14c SHA-1: 3fdaed6e3d6af79a9346bc696a4a07f450b9373d SHA-256: 89218cea0190a0fc64ba8b48f366feda7d5af3c7642d8604438ea953fa247d62
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.me/123?keyword=hack+how+to+get+minecraft+windows+10+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f897023cc2f7.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/wukogor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5f94159d79dc4.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/lokijuronig/geico_horror_movie_commercial.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/adobe_acrobat_pro_dc_reduce_file_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa183b5-0abe-4c6c-82a2-cbaff90e9552/44383640223.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/18475396057.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/reservation_form_hotel.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/16417337202.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C6 3040 bytes
SHA-256: b76b0c952f6e654dd407da31e7b80a36d4e40938a7378cbf64c778fea251f4bb
font_01_sfnt_off00005ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 5712 bytes
SHA-256: 05ee35da8b66d7b6c5257de93d6a888247aa3e03084dc5b92adf9468c3345bef
font_02_sfnt_off00007007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 10504 bytes
SHA-256: bbb32dafea0bf00bfd611dea95355dcf7c37a44d7b39dbd1f58cc6b505bca2a8
font_03_sfnt_off000093ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93ED 16076 bytes
SHA-256: 050cca2678d7435c270027ff58d84efa212ea3c5592871ae9bdc0d1e185112d0