Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6e634f1e9fd4fb…

MALICIOUS

PDF

60.3 KB Created: 2021-01-09 03:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b50144b7a96f0eca777173b6a148dfb3 SHA-1: 31d94a54fe225af6d8366bb47823c9d9e80e6399 SHA-256: 9d6e634f1e9fd4fbc178b081e19f784a5b04f15272dac83f31b3f466e42dd4d9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged by heuristics as a link farm and a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/wb?keyword=vivi%20bubble%20tea%20hoboken%20menu PDF link annotation
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/nenoxovimulanavo.pdfIn PDF document text
    • https://ravusosu.weebly.com/uploads/1/3/4/5/134589623/8283036.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/dajerowalufemubisoxo.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/bigupoz.pdfIn PDF document text
    • https://xorimaki.weebly.com/uploads/1/3/0/7/130739578/5487611.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/5308110.pdfIn PDF document text
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/8c614118941.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/9581770.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/c9b3e643-62b2-4f9e-a576-237037e3a769/defend_your_nuts_2_hacked_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9469cd-a335-4b3e-8c9e-d2c40eacef07/22293918534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a823edaf-79bc-43da-9f48-a75b70b30c56/fanogumomefat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724143e7-df3a-4557-b484-0fb0b1893601/capo_chord_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/milopeb.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/ladenonudalipalovaweman.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_off0000b463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB463 4880 bytes
SHA-256: 663ce1ce885ca4cab0b5e8364d7c4b46302e1f1293c985a82a62757c4e10a0db
font_01_sfnt_off0000c4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DE 9276 bytes
SHA-256: c38d80c32a7da953643401a4781831e478e6c402197c839761e3272febb21da8

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