Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d659175fd64fff…

MALICIOUS

PDF

46.1 KB Created: 2020-11-04 07:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4bc8ba2a813352412e484bcef5faa5f3 SHA-1: 45049c405b1539257ccfb14f49a0092df0d1702f SHA-256: 54d659175fd64fffe2da08b4a3051229ae20934823da286bfffc674e663d4b48
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=vegetation+grown+in+a+mediterranean+climate In PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/4284661.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/defomef-vapiwob-bekesefalenaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f88c95cda9a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remoxi/nilefi.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/savinakepot.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/manual_of_indulgences.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/sivituxukaxatov.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/5052686228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda6a955-45d2-4c6c-9472-e05a6365d0c5/5025190189.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/web_development_course_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c62ad68-3744-4909-ab3c-d7c181526fd8/mavomizub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e23fcb-62dc-4e76-b1ba-1e299191f0de/silowafibimupabikisix.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_off000068e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E1 4928 bytes
SHA-256: 3e2425ab4b11452379f6cdfc370707ffeefb90b3fe627c0b356bd848b06a9ca8
font_01_sfnt_off00007994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 10572 bytes
SHA-256: 04dd023e0393ceab809e6d34d7c148e6cf554f195b82b6070f1a7c60c318a268
font_02_sfnt_off00009d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D8F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2