Malicious PDF — malware analysis report

Static analysis result for SHA-256 be47a6f913f86625…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 12:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 033e8be207eec0a4880c9073cc318cca SHA-1: 86bef2290c87e16546c5be289074cc77cd2d84a0 SHA-256: be47a6f913f86625701555e2deb9c25154096c10e5320f9a73a8b8225110d4b1
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains numerous embedded links, many of which point to disposable domains and are part of a link farm, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's output strongly indicate malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://crophysi.ru/wb?keyword=ejemplos%20de%20dialogo%20estilo%20directo In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fd08a72cf54c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496605/normal_5ff3fd053a7e2.pdfIn PDF document text
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/da49ea2.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/watch_the_woman_in_the_window_2020_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5fffaa03d5574.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/wgeiiji/ballinger_family_merch.pdfIn PDF document text
    • http://dasuwupozu.22web.org/beveiligde_bewerken_gratis.pdfIn PDF document text
    • https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/kinozibipuv.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/mutirexa/australia_awards_referee_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/batgirl_emblem_template.pdfIn PDF document text
    • http://sezajurul.epizy.com/98244649435.pdfIn PDF document text
    • http://xixovunutev.epizy.com/stanley_j5c09_power_station_jump_starter_1000_peak.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/purchase_requisition_form_sample.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_off0000d369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD369 5108 bytes
SHA-256: d1ef0800ba6f7d2883174be41ae9864321cfd32dab0d69bf02b85a76cfe7faed
font_01_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 11252 bytes
SHA-256: 7a28685e8ab33ccd48ca30e52981c9a80173d9e72dac0d2860d3dcce9de786ed
font_02_sfnt_off0001096a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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