Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd7567cd554d10b…

MALICIOUS

PDF

74.5 KB Created: 2021-01-28 01:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: be4e741e0e9098841bd3fb7733d6c0e1 SHA-1: d79c5099fddd3878b83401ab00ac783330170ff3 SHA-256: 4dd7567cd554d10b89c1fd8d4a650db2770afa02ccb2ab3576dfda33ab4b5065
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on 'free casino slot games for real money'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, suggesting a link farm for SEO manipulation or traffic redirection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/wb?keyword=free%20casino%20slot%20games%20for%20real%20money PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490274/normal_600f761f8e88e.pdfIn PDF document text
    • https://cdn.sqhk.co/rufigukuj/38ij568/football_live_score_today_match_watch_online.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/1753504.pdfIn PDF document text
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/7019124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fdac7a4aff12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fe17e5d9424b.pdfIn PDF document text
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/moxasexelexeloj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5fe597f2263b7.pdfIn PDF document text
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/dipupamememeto.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://s3.amazonaws.com/wutezigojuxi/2750684416.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/cdata_xml_formatter.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/druid_dnd_character_sheet.pdfIn PDF document text
    • http://tetomor.rf.gd/tuxotojuborem.pdfIn PDF document text
    • http://joxamemi.epizy.com/medizojepi.pdfIn PDF document text
    • http://ratudafoxivux.rf.gd/comparing_two_excel_sheets_data.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/gikuvepadavuwanujazav.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 5044 bytes
SHA-256: 7330c233da813c008582ffcc47ced9bb3c517776b4b727a498fa6576b021d1ca
font_01_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 9932 bytes
SHA-256: d39805e8d3689856f14e1f4e78a7159dbfb69fc8c49a8b85033b10ce5f9e3730
font_02_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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