Malicious PDF — malware analysis report

Static analysis result for SHA-256 676678255731f63a…

MALICIOUS

PDF

89.7 KB Created: 2021-03-31 05:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e0da625d7e870aecd1267b2d30199bd SHA-1: 8091c00e09fdbab78fc055c63121be155ecb54ba SHA-256: 676678255731f63acd3d5e1b178c823587134b7693efe8ba6d6c029f0fee7304
186 Risk Score

Malware Insights

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

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 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=ala+mhigo+dungeon+guide PDF link annotation
    • http://gukabibus.mygamesonline.org/jlab_jbuds_air_charging_case_lights.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_6009f90301127.pdfIn PDF document text
    • https://jibogikufojubu.weebly.com/uploads/1/3/1/4/131438018/9985543.pdfIn PDF document text
    • https://beveroseve.weebly.com/uploads/1/3/5/3/135316004/a1d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_603854410358c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_60554d16f1b3e.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/5416211841.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/1b9b471a9f5b.pdfIn PDF document text
    • http://koreanluxe.com/cargowise_exam_answersx7xjw.pdfIn PDF document text
    • https://xiresipi.weebly.com/uploads/1/3/1/1/131164504/7961966.pdfIn PDF document text
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/nonamubid.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/zisalosexisojumubelotufer.pdfIn PDF document text
    • http://eeeeeyyy.space/xefisodasakkowsj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d193fbaf-dd38-4630-a567-f72395c914b9/different_chart_patterns_in_technical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/11242912249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4baaf2-ea53-4b80-8af6-e119519eb49b/34387610850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0365c5-70a1-46e1-ab86-84d70acc432b/2003_chevy_s10_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9da8000-4608-4c81-a4c5-9b82d9706d36/sufogogodexixu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/alkaline_phosphatase_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff540c3c-aabc-4d28-a8ab-4a03a7df87b2/89732677745.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/dork_diaries_10_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/basara_ppsspp_mod_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 4956 bytes
SHA-256: 5427ce6062410a0a0d38c688a76445b9ea6f7d9f38a2d90d5aba9424f699a505
font_01_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 10736 bytes
SHA-256: 84e2e06b10bb109c24a9d368d872d259774a18dc1cae9f22cafee95172dda689
font_02_sfnt_off000143ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AB 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67