Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2f4a2452becc7f…

MALICIOUS

PDF

86.3 KB Created: 2021-01-21 00:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c635c258f75231120bf07c5d4ee70ee8 SHA-1: 3b6cb88d9f74b280c83a5212c3e20bd5d924eec3 SHA-256: 8e2f4a2452becc7f34bb35400875049ec79c3c6a5b7d6a1f1dc8c71855660d6c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://traffmen.ru/123?utm_term=the+real+barenziah+skyrim'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of malicious links is sufficient evidence for a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=the+real+barenziah+skyrim In PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fc9c29399765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fcb5ce1a0ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fa68d9d9990d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5fdf486d4d7c8.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/stylesheet_example_react_native.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
    • http://refewebol.epizy.com/bhagavad_gita_chapter_3_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/zereka.pdfIn PDF document text
    • http://vewomani.rf.gd/los_angeles_attractions_map.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/caveat_brush_regular_free.pdfIn PDF document text
    • http://jesebikalag.epizy.com/96506591576.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/cosmic_energy_images.pdfIn PDF document text
    • http://folujas.epizy.com/47722103573.pdfIn PDF document text
    • http://jutejuviwolopis.rf.gd/street_fighter_iv_mod_apk_data.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_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 4828 bytes
SHA-256: 1502235227a9b459b65710563866198dd6e93028f17781b7c70631f6721fa055
font_01_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 10196 bytes
SHA-256: 212126290f987de074fb45e3f0ebdc3da34b5e40af6d454f663cde015f89169f
font_02_sfnt_off00013e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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