Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c76c3e2c51e127…

MALICIOUS

PDF

73.0 KB Created: 2020-12-26 21:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e7a996dca5f3c3e8b0dd1c6ae93800b9 SHA-1: edfd1c88256afe83670905ac394de5eeb8e3261d SHA-256: 45c76c3e2c51e127ea0669c55501c716600a9565b4e435625d37d2e7bdb40ba3
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded external links, suggesting a link farm or distribution mechanism. The primary URL, https://traffking.ru/123?utm_term=a+separate+peace+pdf+questions, is suspicious and likely leads to a malicious site. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=a+separate+peace+pdf+questions PDF link annotation
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/nuliwoton_tovevepexukagaz.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/lelevetetofezo.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/78467d88617e9f.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/66a674d8-f5bd-460c-854e-88630fc2fe11/mafutalupadoperatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bdb0394-5d93-43cc-83d5-daed20e39fc8/zexonolezamuzibolow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416532af-74a2-4b85-b50e-98c8ff45f1eb/25525022844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9eeba6-af8f-4bf0-91b1-f7e79fe18043/jimid.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/zokovazonuderasek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ea2b2e-95ca-4331-a94d-ab99ca989ed4/durabuzebilewurazapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65015f27-4220-4bac-ad19-49f8e41432b1/staar_test_bubble_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/bajrangi_bhaijaan_movie_songs_pagalworld.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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 5232 bytes
SHA-256: 01690d4a616375431a38ed432bfb0a0b6043a780d34da5fd9acd98a0bae997d6
font_01_sfnt_off0000f511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 10016 bytes
SHA-256: 816c0305f6db0942b13bb9c42e18a9d5525ce1eb0603a7a410364b67dc6c0f7a