Malicious PDF — malware analysis report

Static analysis result for SHA-256 a947cb72747f6664…

MALICIOUS

PDF

50.4 KB Created: 2020-10-24 16:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e0b6fd2e2776696cbf1b6a73a53f8d1c SHA-1: 9b7bfb60ea016293af3ca13611ee0170839d7651 SHA-256: a947cb72747f6664353f582c6092f28d1644c90d47760d8385d5cec575f01fe8
194 Risk Score

Malware Insights

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

The PDF contains numerous links, forming an SEO link farm, that redirect to a malicious URL. The primary lure is to download a game mod, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest malicious intent, likely involving a redirect to a payload or further phishing 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://ggtraff.ru/123?keyword=download+game+i+love+pasta+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8a5af3ccb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f88a6463cfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f9302fbba7b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5f9117b1cfa02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f89a888b5fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_5f8f6bca3b7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5f935def507dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8ed8efb09c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f93ceac123cb.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/minepapotu_poluporopiw_gazojonaku.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/1166907.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/wilugugo/90383190657.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/geriatric_assessment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/loctite_5772.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/algorithme_gntique_cours.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/57834658998.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/journal_el_khabar_erriadhi.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/fasalajobodin.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/64672170463.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_off00005ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 4552 bytes
SHA-256: d23cf729f0aab8161096ac8ca22710c3dfe7919b120e3fac8e9a430d432defa8
font_01_sfnt_off00006ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 5400 bytes
SHA-256: 59fc170d5466f654cd452fdd327d5736c1fcec00e7bf21c937fa8bc732dd8d0f
font_02_sfnt_off00008115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8115 10592 bytes
SHA-256: 279367ef7e33064954ea6e05becb7e5ae3c4c1c2492dc92b5e6aa82a2447146b
font_03_sfnt_off0000a565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA565 16092 bytes
SHA-256: 5f61313f1a3e3a671973c9d1dfad2a5a183df5c034e29bf06d98a49d76937e84