Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc684f517628ef03…

MALICIOUS

PDF

47.3 KB Created: 2020-11-07 21:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 433379fe781e0f2cf4873fdb1b84d7b4 SHA-1: ecfd416cc777f998ae2c61635c92443a0d76bf68 SHA-256: fc684f517628ef03da60317a3718b612eb973a116df0565c3e0aca70ee902d59
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links, including one to a known malicious redirector, disguised as a Disney cast member login page. This indicates a phishing attempt to harvest credentials. The PDF also hosts a large number of external links, suggesting it is part of an SEO link farm designed to improve search engine rankings for malicious content.

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://traffmen.ru/123?keyword=disney+hub+login+page+for+cast+members In PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/66e1c345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_5f9e3a0fd210c.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/kaluvikulepaboja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5f8c1ff101b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fa4b519e766f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f95e773b0abe.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://kokevifezon.files.wordpress.com/2020/11/gigumosedafepamixiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/zewewumipumegutumikuzizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c849a3d-3ac0-4ba8-a775-c493fc7f401c/35171068051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e89c342-00ce-4790-86c4-acdc7fb3c429/24783572361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1ba9c8-ad3a-4234-9ccb-b06d134f7d54/39523102103.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c60c41b-4311-4d92-b4e7-ba70054bf977/fugenefuwiguxaxut.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5552 bytes
SHA-256: 7d57eb8eb37eb9eecf80b2c96a922b7ad1ac74ff8f7f8b87b4e87fa624170c4f
font_01_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 11572 bytes
SHA-256: 0573c3731cab60dac9b5608cad84acd194e77c69136e92526304e13f41d39516
font_02_sfnt_off0000a251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA251 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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