Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef3e8358e9ca7d9…

MALICIOUS

PDF

64.8 KB Created: 2020-12-24 02:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0102cba329b96a5f94ff52d0e99809e8 SHA-1: 7a789db39f8f00321f5c4689b6098673c535d3fe SHA-256: 9ef3e8358e9ca7d97b0a6237f9f2e58b008619fdc41bc517adc75117760c6acf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing or trojan PDF. The embedded URL points to a domain associated with potentially malicious activity, suggesting the document is designed to drive traffic to a compromised or malicious website.

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://trafffi.ru/strik?utm_term=cookie+recipes+without+eggs+and+brown+sugar PDF link annotation
    • https://nimediwajukijiz.weebly.com/uploads/1/3/4/5/134501673/dadifuvifamodivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5faf1305a66da.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/acba796e1.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/db645e0b-6e99-4d6c-98c0-a36d9fc5092e/nesuderivimuvujepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02b34cb-803e-4dc4-a81f-29f6849a18e2/shell_shocked_mp3_download_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa376da1-3b1a-4e7c-8a7d-b313666bb0a4/organic_chemistry_all_reactions_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8914413d-dd41-4e97-a7ed-7119cb6b197e/sitosadebizej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8870999b-46c2-4c95-8b78-f02de7e2c580/dominique_alfaro_hooters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368fb334-2a9b-4d50-8331-e2e6404282e1/80846494376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298df943-dd22-4022-b23e-8739f7a7784e/28987732725.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/citra_animal_crossing_new_leaf_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34da254c-6575-4c71-b89d-723e20a1ba89/visual_perception_figure_ground_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c692fe6-5be4-4b8e-8c7a-7d9219fd2b80/oreillys_klamath_falls.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_off0000c055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC055 5504 bytes
SHA-256: 42c0d3fcfe9ab0749143e93630585555b304085b171613ace72486adf9feeba0
font_01_sfnt_off0000d315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD315 10320 bytes
SHA-256: 1d103ac7c594f6105fd2a0c78a76fbbe4d3bcc370676b9c40b9b996e1e352609

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