Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2ee1e00f99e89b…

MALICIOUS

PDF

70.8 KB Created: 2021-02-20 03:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4677a78833116f09fb7dae459a3583f4 SHA-1: f493447a0ff2b4914196de286f50d6ef889aff98 SHA-256: 8d2ee1e00f99e89be662ef0833aa8343095f6b2411721ad73651935486ba2198
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://jottigo.ru/wix?keyword=introduction+to+statistical+investigations+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374198/normal_60183c0ad0e8b.pdfIn PDF document text
    • http://zonubeluzi.iblogger.org/25037337091.pdfIn PDF document text
    • http://lg-supportteam.com/what_is_the_definition_of_order_of_operationspyytz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_601efb76bdf62.pdfIn PDF document text
    • http://daating19.site/xupuperexajewesazomd29p4.pdfIn PDF document text
    • http://3gusevshop.website/setimulexajisw5kk.pdfIn PDF document text
    • http://hydrofthol.space/bitiwegurojajokasei4pcy.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/aK2JgcB/99535805206.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/rqijmn6/idle_gun_merge_and_shoot_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_60028ec0debef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_601f1466a4164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaguxupinirulop.epizy.com/aikido_bokken_techniques.pdfIn PDF document text
    • http://ratadipemor.epizy.com/mawafawazupupavibududasiw.pdfIn PDF document text
    • http://nigowona.rf.gd/61539033979.pdfIn PDF document text
    • http://sonedef.epizy.com/sakuritepidarut.pdfIn PDF document text
    • http://vuzoziwulof.epizy.com/bitos.pdfIn PDF document text
    • http://nawokuzowurib.epizy.com/eddie_bauer_quadtrek_travel_system_recall.pdfIn PDF document text
    • http://lavofedelozus.rf.gd/12571737981.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79F 5360 bytes
SHA-256: e05a7573588f0a0ec38b1f27332014a86c014e1b0a4a29920b39f7d54999f191
font_01_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 10376 bytes
SHA-256: f95d7fb1bd0f0220900d99a03b9e0e2fba3f34660dbefed0492427e910f746cd