Malicious PDF — malware analysis report

Static analysis result for SHA-256 27598c4fa44e7722…

MALICIOUS

PDF

77.9 KB Created: 2021-04-05 06:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1fcd28bc51e4f467a7569f4041ab63a SHA-1: e19b6b3ce01230f34a9c9f8035c8abc795867f28 SHA-256: 27598c4fa44e7722e7a36d5128ac7062bfe28985c85ea19f2bdb60923f541e9e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://leonvi.ru/wix?keyword=the+lottery+quiz+answers', suggests a lure related to a lottery quiz. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely for phishing or distributing further malware.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=the+lottery+quiz+answers
    • https://gekuxufetog.weebly.com/uploads/1/3/1/3/131384115/186861.pdf
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/7555045.pdf
    • http://lenulari.mypressonline.com/jagoborixuvupagozawolaka.pdf
    • https://cdn.sqhk.co/xufaribo/kRihCB3/chandler_island_for_sale_maine.pdf
    • https://cdn.sqhk.co/xubupigegi/GgfFaja/banco_bradesco_numero.pdf
    • https://pifixisoti.weebly.com/uploads/1/3/4/3/134379985/sovumesudozirune.pdf
    • https://cdn.sqhk.co/seponidozit/4jcUggl/58597741105.pdf
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/wuzulikekoli_ruwis_xusexinedifa_jigiwoxofileleg.pdf
    • https://nalafefig.weebly.com/uploads/1/3/1/3/131379301/9739581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7884c89e-41fc-45ab-8812-34936236e2e3/why_wont_my_facebook_marketplace_work.pdf
    • https://uploads.strikinglycdn.com/files/a1a6d3c8-6e0e-4721-a0e5-8d1b446db4bd/is_qled_much_better_than_4k.pdf
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_97587e7ea02e47098398651951108197.pdf?index=true
    • https://uploads.strikinglycdn.com/files/195fafc7-a0ea-4683-8799-bc00739150fa/58071372810.pdf
    • https://uploads.strikinglycdn.com/files/96121062-8727-47eb-815c-ae489d0aedc0/96653751700.pdf
    • https://uploads.strikinglycdn.com/files/fe7a697f-f321-40b1-af4d-2ac9cd2b6541/calligraphy_letters_for_beginners_with_pencil.pdf
    • http://luvabokinoleg.onlinewebshop.net/acer_v5_battery_plugged_in_not_charging.pdf
    • https://uploads.strikinglycdn.com/files/3d1e8d38-e24d-40e9-aa3e-3de5a4a6f04c/phonics_activities_for_grade_2.pdf
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_516364995158404c8555654a51e414d7.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_off0000f341.bin
0f6ea7a52176b2968f19c120f1fa0e81fabe4234833277099490c64c78bb3b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 5092 bytes
font_01_sfnt_off000104aa.bin
49cb152dcf9adfea7bf60391c60164937dae71b840617f7523b8bc84f9017eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 11240 bytes

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