Malicious PDF — malware analysis report

Static analysis result for SHA-256 d305a3fb3a73813a…

MALICIOUS

PDF

71.5 KB Created: 2020-11-10 09:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a7938729c99cfcb5b0530c40cf4b590f SHA-1: c3b14d90ecf335ec47d40fe9100261e43e5288c0 SHA-256: d305a3fb3a73813a4eeeddd8abea7cdb16cec6c5f23e179d3b1bad3f8845140f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?keyword=hongos+en+los+pies PDF link annotation
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/risite.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/1ca20b9f4ab7142.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/jofawemajajewotazo.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/didazitutegitewir.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/rukatupexuwal-wigokisiwevovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f93420167c45.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/9565995.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/3a446db3-9b2e-40d8-8108-a91c68813c33/10224663708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a52a95-3a55-47b1-b7ae-f9402fa3feca/57699826051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac04dc5-c43c-42c1-8922-b6a000298871/40537830573.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/a_mclendon_christmas_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38e9ac5-8ee0-450c-bb14-f6fff556cca9/minecraft_pe_launcher_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/28754436121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54138683-d618-46cd-849a-7168c18ea239/jiwotirajoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3069c87-fab6-453a-9b04-7f0c1037cac7/lenetofarexemuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f16cdc7-8544-47cf-9d18-207905acc232/bebov.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_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 4644 bytes
SHA-256: 23472f585b9bf2656356fc548341386290d56ddaf00d67357d2ce376b9d4a562
font_01_sfnt_off0000ecbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 11336 bytes
SHA-256: 5518b42f808771d596f42848065b814c2a9cd8ae878ea8ac8fe9a31ac134aa69

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