Malicious PDF — malware analysis report

Static analysis result for SHA-256 798e9e50e196bbac…

MALICIOUS

PDF

69.5 KB Created: 2020-11-16 20:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1683443ddcc2e70a0e21f3289392864 SHA-1: d66998fc8b556142088be732a1f26787508e23c9 SHA-256: 798e9e50e196bbac86ee6c3bd9a83c037db901e0fd523c5d63caeae160a45b07
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=uniden+grant+xl+mods PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454543/normal_5fa6cfef0f302.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/51935e9.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/baziv-posizujog-guxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5fadc4bf315cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_5fa7b269a24c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f8a024948a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5faa062900fc1.pdfIn PDF document text
    • https://zulebesawezule.weebly.com/uploads/1/3/4/5/134589138/cca4f0f.pdfIn PDF document text
    • https://notemuwos.weebly.com/uploads/1/3/4/7/134717082/6720301.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/zirojopemup/zaratustra_nietzsche.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf2f554-8b50-405f-9c0d-82b8e5e968ee/fegeridolagebizafajoku.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/world_of_tanks_console_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18e6e59-30a9-4f72-8898-4166c16cd1a6/kibenuberiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/95499224386.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/xetuteguzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc71597-faa0-44d8-8d90-2a1f347e6371/free_hand_lettering_alphabet_workshe.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_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 5204 bytes
SHA-256: bb75793e7fd025686ce036b64b689c306e73b6e0067c66eb2f4b226295eb824f
font_01_sfnt_off0000e397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 11168 bytes
SHA-256: 9cae88d4fffbcc7f0ead0366d5da4b1f197679f9ef194c63fb7a669339fe0ab3

Open this report in the interactive analyzer, or submit your own file for analysis.