Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbeafbce2ef452e…

MALICIOUS

PDF

70.2 KB Created: 2020-12-21 13:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 776c0ae423bb9def09f4381dc4ba555e SHA-1: 336c9f6f271ad01d726cd424de305c8f084caa42 SHA-256: 1cbeafbce2ef452eb7974a9aee5623cb85cdf034176e2658adc3db4a85e90fec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://traffset.ru/123?utm_term=colin+nathaniel+scott+video', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=colin+nathaniel+scott+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fbd8c83cfde8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5fa2a2bac086d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_5fad57c3e6861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_5f9f28163d379.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/9cb135181bb5569.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/d2554171-39bb-4cef-92d3-349ed72e73df/nexokesoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351fc161-ab5a-49c5-8dcb-60d0041eeccc/sovadokuwanexawu.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/busuporijokafisopabitebob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce35818eda244dc4ac271d/t/5fd15ee58ba64b78df46fb0f/1607556841023/see_no_evil_2_zone_telechargement.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce157a90e5b06becb45624/t/5fce765901fe1e1dcec1354d/1607366234615/16257516233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d298ae-bf2e-4b4e-b4db-81a333c535f3/library_genesis_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385b55cd-9f00-4ddc-9256-ea36c0632dbe/kitamenibozudajol.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE8 4896 bytes
SHA-256: fe4bcd08e8f8458544c8665f285bc9cdd4a8bfdd80754329fd6e31812b5e8a2b
font_01_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000e7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 10536 bytes
SHA-256: cd0ee24387384214f1e44bfd46088de7427fbcaecf6ed38eac8e75e426060ca5

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