Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20818239d56fe41…

MALICIOUS

PDF

73.2 KB Created: 2021-01-15 06:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5b97c2d0fe5bb5cbff7a87f11fb8b89f SHA-1: 8402eb682b93d3cced68b626d5f166188ad66710 SHA-256: e20818239d56fe418a3045af7a3c9374c3628aeec6505b691790818007d735c9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to disposable domains and Weebly-hosted PDFs, suggesting a tactic for SEO manipulation or distributing further malicious content. The presence of multiple external links and the nature of the hosting services strongly suggest this document is part of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/aws?utm_term=calisthenics+program+pdf PDF link annotation
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/6289584.pdfIn PDF document text
    • https://womazineput.weebly.com/uploads/1/3/4/8/134895737/0fa48d7d2ca4d.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/tudavenusos_fexolo_pojoxumiwe_kejefuwitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5ffae313c2a23.pdfIn PDF document text
    • https://site-1175466.mozfiles.com/files/1175466/45318289934.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/pefovoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f876129cd64c.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.pdfIn PDF document text
    • https://site-1174578.mozfiles.com/files/1174578/piano_chords_chart_download_free.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/fotepopunaj/channel_7_eyewitness_news_new_york_reporters.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_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 5476 bytes
SHA-256: 89320840fc8b7904022ab44d1c18321eccd5142edd2ce6f15d135f0197ea7c5f
font_01_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10256 bytes
SHA-256: b8ca9ef2c41a4be073c8c95c28ec4d5730579cef7e631b96beb27dee35b1284e

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