Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d46508286e03ce1…

MALICIOUS

PDF

81.5 KB Created: 2021-04-30 06:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f768fb04ac05a007cd2433c0796a9267 SHA-1: a4edb6f619fd461e12be7127a5a5d27b64150d73 SHA-256: 2d46508286e03ce13bf53475b0ed1f058049628129844a5c60a36e7d16f751a4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+use+a+bosch+silence+plus+dishwasher PDF link annotation
    • https://cdn.sqhk.co/dexasubu/ejfgegg/92832866718.pdfIn PDF document text
    • https://favapebunekef.weebly.com/uploads/1/3/0/8/130874429/rojadoj_gobazemuvimalo.pdfIn PDF document text
    • http://chestlune.online/vavapodagixalirowanilalisnan2.pdfIn PDF document text
    • http://lasns.fun/654792212841yvad.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/Nicihgh/gosuxutotinutifaveduwato.pdfIn PDF document text
    • http://shopeuro.pro/distinguish_collusive_and_non-collusive_oligopoly_by_their_definitionsm6xh3.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/2355115.pdfIn PDF document text
    • http://lesantyqas.online/7654425823biczj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/67227479990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0891a5f1-fd6e-48ea-9000-125c82ed9561/how_to_make_an_emp_slot_jammer.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/nuxijukisakufomajipomamen.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/5247048695.pdfIn PDF document text
    • http://sosotiw.rf.gd/21816749753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6074f38-e191-4fdf-a352-2a9d0ad3fec7/71234639253.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/67679795933.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/incident_nonconformity_and_corrective_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915083f9-a581-45cd-b2f5-a8a140c35ba4/how_to_make_whitewash_with_paint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0ee10d-9cbf-49ed-9db2-4ae32c72e323/fluke_network_dtx-1800_cable_analyzer_software.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/peter_pan_story_book.pdfIn PDF document text
    • http://monifixo.rf.gd/89427291485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450d7025-8474-44fe-8f33-5a74ebc0924f/xonelijuzulupaxugu.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/rasirifesefeniwepifof.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_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 5356 bytes
SHA-256: cbc41fd8faeb83dece2f86334da02397a724e71ae6a9f6bfaf6a476cf7c569e5
font_01_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 10476 bytes
SHA-256: 7d7d94fbcaf0a693f37c3870383fcaee972726d9ff873bcf8f4feffac8b6b575

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