Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61e9934c8b70821…

MALICIOUS

PDF

88.0 KB Created: 2021-03-30 04:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cbb55e3fa435edf1e0ae90c375b29e2 SHA-1: 4473ace6fd8f8e3f89a63e638dc0e71c1746d41d SHA-256: c61e9934c8b708216f379a8dacb673fc8516381718c2491603b2c6ad32c97858
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on Weebly and other domains, indicative of a link farm or SEO spamming technique. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/aws?utm_term=hoover+twin+tank+steam+mop+model+wh20200
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/9c1cb2da8afd4.pdf
    • https://newovedisi.weebly.com/uploads/1/3/5/3/135348170/5422827.pdf
    • http://studyweb.site/philip_glass_buys_a_loaf_of_breadnllzl.pdf
    • http://redpandarecycling.com/16243953808u298w.pdf
    • http://theraisins.pro/34860735316s2uw4.pdf
    • https://moxuludo.weebly.com/uploads/1/3/4/7/134759924/0e01a224.pdf
    • https://mitabepomumo.weebly.com/uploads/1/3/1/8/131872015/sepozur-jidamin-belin.pdf
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/ximalajowujovo-butodobe-bomabigovalawag.pdf
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/fobabar.pdf
    • https://bopamoverera.weebly.com/uploads/1/3/1/4/131408256/gafusukilas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a76b5aa-7330-41c4-ab87-d3306d11c67e/pozusirovijuvopubifuw.pdf
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_792908fdfc7041328b9ad980277d8e82.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d4f2080b-2782-452b-9d70-4e33a63fe822/65574136572.pdf
    • https://uploads.strikinglycdn.com/files/f20f4972-717c-4a5c-b653-149bd7a419cf/thermador_range_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/50c19585-3b06-4f0e-b33c-c33a43d4f00b/nikon_d5600_dslr_camera_reviews.pdf
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_93f00c926bf546dbacb4800d23c97b78.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001163a.bin
0644ac9e471fd657fd80070d9ece656219100e9ca057cfe6288bfc1a932d6e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 5648 bytes
font_01_sfnt_off00012956.bin
29a1e568865f71c44995d2af7d3d4ddef2c5131fcb7b61d1a2253028b26507d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12956 12120 bytes

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