Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2af6505c3e03992…

MALICIOUS

PDF

45.0 KB Created: 2020-11-05 20:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0e6088612b6960c0da27b6e23f663201 SHA-1: 36ab43150c5d2e29cd58596fccc480129229b4f1 SHA-256: f2af6505c3e03992349565fee42d64cec1564471d159082bb92673a9db206be2
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to PDF files hosted on services like Weebly and AWS, suggesting a link farm or redirection mechanism. The presence of the URL 'https://trafffi.ru/123?keyword=is+complete+lean+body+hacks+a+scam' within the document body, combined with the 'PDF_SEO_LINK_FARM' heuristic, indicates a likely attempt to lure users to scam-related content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffi.ru/123?keyword=is+complete+lean+body+hacks+a+scam PDF link annotation
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/kasawo-rakereroboxit-wuzunirib-midagawatebogef.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/211a0d.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/xumixekuvepob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f8c7aa543886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5f9ebbbdbe158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5fa3e2a61041d.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/5987814.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/zevatepixifir.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/latufenaw/muropawemevolivakuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9c5817-7309-4c7e-b583-96745b4fcf67/24396389171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2549c4b9-bdf9-49ec-85bf-c8993e186b58/jepexupa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/vodenitegure.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/gixurekexakofatawivin.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/sowanagixijik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97704ebd-21ae-4ad3-a4d1-f5c78308dd55/febepejabevovonubofen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfb5a7d-cfbf-4fda-ba3e-ea2c8afb2d85/kejegojogovugivanikabov.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_off0000671d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 5460 bytes
SHA-256: d9496fca6e7cd4fc462c90a0def7a1384a9f9a2d78e3ec182c632e3502cb4fe9
font_01_sfnt_off0000797e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797E 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000820c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820C 10688 bytes
SHA-256: 0c2407b37e6b8479c51de0c812631e7d9e01cd83977223f14c8a363e41f8b2c4

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