Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ede83ca25274ae4…

MALICIOUS

PDF

85.2 KB Created: 2021-01-13 18:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1875f8e1b1fb0b9728341797b26d9b4b SHA-1: 0c9e32d3d1a7b0bb1b687415f2b4ebc90dbab015 SHA-256: 1ede83ca25274ae4aac0d806f1d6d5071a70c635000ebedef22e1bb8a75a4b6c
192 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links and a heuristic firing for a malicious redirector. The presence of a 'download button' lure suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a malicious site for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=audio+biblical+pronunciation+guide In PDF document text
    • https://cdn.sqhk.co/pomorezolo/tjehicY/xevoxamixixemamim.pdfIn PDF document text
    • https://site-1176264.mozfiles.com/files/1176264/77427899807.pdfIn PDF document text
    • https://site-1180563.mozfiles.com/files/1180563/joker_face_wallpaper_hd_download_for_android_mobile.pdfIn PDF document text
    • https://vuwakoge.weebly.com/uploads/1/3/4/3/134368269/799629.pdfIn PDF document text
    • https://site-1171153.mozfiles.com/files/1171153/fb_login_facebook_m_touch.pdfIn PDF document text
    • https://site-1166739.mozfiles.com/files/1166739/wajesu.pdfIn PDF document text
    • https://site-1174816.mozfiles.com/files/1174816/88492310561.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/texas_parks_and_wildlife_magazine_jobs.pdfIn PDF document text
    • https://site-1175031.mozfiles.com/files/1175031/mcclain_county_oklahoma_warrant_search.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/59909287b197d21.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/jc7ngjh/55268367899.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/1UNxhhA/92113621254.pdfIn PDF document text
    • https://biwilodumiz.weebly.com/uploads/1/3/4/3/134319983/8b2bab23cd9c.pdfIn PDF document text
    • https://pevexozu.weebly.com/uploads/1/3/4/8/134857768/2461a6da3c907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 5192 bytes
SHA-256: 2046800ce19473ef6efcc521b38d4222295dc20eb87747d131d29632eeea1508
font_01_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 11792 bytes
SHA-256: 1f8080432dfedd8652c70ed507cb1e1b7b8464078e2d59f7e4f747ddd050003e

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