Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebf440c9d5816b7…

MALICIOUS

PDF

62.0 KB Created: 2020-11-18 11:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d30c5bee947d3b4b7528a0477025f986 SHA-1: 2b9d49a4bafaf60548e9e533b010846192e85e64 SHA-256: 4ebf440c9d5816b70497fe3f900b33759844a9bfec316b447e07a47ee8c45287
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm designed to distribute malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary lure appears to be a 'Total money makeover workbook pdf', directing users to a redirector URL. While no scripts were extracted, the presence of numerous external PDF links suggests an attempt to lead users to potentially malicious documents or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=total+money+makeover+workbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f9227cf57ac7.pdfIn PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/muboj.pdfIn PDF document text
    • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/5548938.pdfIn PDF document text
    • https://tafogufuju.weebly.com/uploads/1/3/4/6/134638326/9953362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f9013ca34c70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fb44b88c1539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5fb2d7f24aa74.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/zafupulegaxiwo_gobiwobo_loraxawaporogop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f958f5b04f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5f9b14b69588c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f9695b29211a.pdfIn PDF document text
    • https://vubedokixe.weebly.com/uploads/1/3/4/7/134716192/bef361310092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 5416 bytes
SHA-256: 66e1d2dc2a2fa0e185af147ccaec4cb484acfd3ca95614c963fe6860145abe77
font_01_sfnt_off0000c8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 10112 bytes
SHA-256: f525a82987e31fd3fc95ba1d4232e35ac2e3208472e8f6a88f8fdecfa228d5c3

Open this report in the interactive analyzer, or submit your own file for analysis.