Malicious PDF — malware analysis report

Static analysis result for SHA-256 e068f3f07a5d5fb8…

MALICIOUS

PDF

67.5 KB Created: 2020-12-02 19:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f92cdbf8f701e5ae96cfb2342441333 SHA-1: 42900f590d8ebb8a2518ed45964dbcaefa5ddd37 SHA-256: e068f3f07a5d5fb83ababc65b6c6e27774caafab2934d38acbb47a700f0f992f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=flaws+and+all+piano+sheet+music PDF link annotation
    • https://nakilogizo.weebly.com/uploads/1/3/4/3/134363069/7d897d.pdfIn PDF document text
    • https://nepigisebax.weebly.com/uploads/1/3/4/4/134477897/morokutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5f90605049338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5f9a1b0f8c79c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5f968b532aac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5faaf6f51ba17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f965016126e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5fae93c37ff1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fa22682bdcb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5fa46109f1e24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc347c00a2757459bf24eac/t/5fc37cc0f81c9a2a0c0ebd0c/1606646977567/watch_dallas_cowboys_game_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac83aa3-f435-4893-8c91-c908ccc74a43/avesta_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529464bf-ae88-4519-a826-5d90299c8255/49238222781.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3814cdf132613bbce2363/t/5fc543f761e25426e1e47146/1606763511927/tizuvaporufusodev.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_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 5264 bytes
SHA-256: e6ed7c71cf25c3682d4e1ccfa8ecab46a8f3e9eed5dd42751005aaccdd5e8ba4
font_01_sfnt_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 11092 bytes
SHA-256: fe20b4aab1b3bb8f506892d557be1cb36788df2e2f7abaed95febce92b480888

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