Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec761dfbb3b9a1a…

MALICIOUS

PDF

78.8 KB Created: 2021-05-08 22:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5476209f2645b37bfe681d7555c9d025 SHA-1: ae96309ed9c7b40cfff2a8f4a2e139b009773c03 SHA-256: cec761dfbb3b9a1a489926f20dfd130fedfb7e869899bd8def4c376f7580c365
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a link farm and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to translation services, aligning with phishing or malware delivery tactics. The presence of external URIs and the ML/ClamAV detections strongly indicate malicious intent.

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://gimoguvi.ru/strik?utm_term=stand+up+translate+spanish PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5fdeb3226e39d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_6044fb92dc729.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/71902619723.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/kezalojipamelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5fd7dffe56514.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/93765834122.pdfIn PDF document text
    • http://pikejofopon.mypressonline.com/common_sense_pamphlet.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/wuduturilagiwevixilebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_605a9d6f99358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_604149637c5fc.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/donarepemi/tebasewelakosilosujakemab.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/77328704514.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/woxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb5d575-7a1d-4a34-9965-a7bbd694b758/next_stage_of_human_evolution.pdfIn PDF document text
    • http://zeteximezoxa.myartsonline.com/sociology_of_religion_national_open_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4c13e5-5586-4ee8-85a8-b053945bb8e0/80794862152.pdfIn PDF document text
    • http://xonolori.atwebpages.com/xunolijofenajewob.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/java_jdk_7_for_ubuntu_14._04.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/competency_framework_powerpoint_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df8153a-1fef-4d8c-a31c-ff0356e73a59/gebumitofadanojurez.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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 4920 bytes
SHA-256: 5b6dabe45fe8e65a41700b17c1b5ca668bd5854b4105bc55afc589a91bcd040c
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 10808 bytes
SHA-256: 2ce409d4254523499fad9d8a481efd5c920c8de78d7d76f04f435ddd8b5a3970
font_02_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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