Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0d58fe51092591…

MALICIOUS

PDF

73.8 KB Created: 2020-11-19 21:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e1ddc252ed59d5bcd64774bdf4aaecb9 SHA-1: 8136d4b56e58b9bbabfe4523cba9fa46f5846d56 SHA-256: 4e0d58fe51092591e53e666ec2d5236fe130374abbeed1eb836320937dac9184
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=150+ml+ile+to+oz In PDF document text
    • https://nagafibujur.weebly.com/uploads/1/3/4/5/134514283/zidilasekarunufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875401c5f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5fa8877f09135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8989df611aa.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/pogejemejoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5fad73f099994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f95748f92609.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/6ff2c4d4-f058-40c9-ab21-582edf1dc9f1/ketow.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/a_thousand_years_full_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/cinema_apk_download_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3e2562-3ee2-4926-8f9f-e49ec58dd706/kotazonomiguwanuliwum.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/a_case_study_of_internet_game_addiction.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/kenner_starting_lineup_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5305bca-6504-49a3-bde0-054a25036858/kakajilik.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1B 4620 bytes
SHA-256: ef7a98857a3057a8f6091d03ff1db078816c0dc5e7cfaba28281e2bcc95d716a
font_01_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 12408 bytes
SHA-256: 892bd78b8056eac39bcb3ba42f85c8fd45f26c55efe1562629e123cbbebd5dd4
font_02_sfnt_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 16216 bytes
SHA-256: 5cb4188777f33cd410073f8b9d14bcb5a62f3956273c75e1cc66e568e6902af1

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