Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8ebd9f1df947d3…

MALICIOUS

PDF

74.6 KB Created: 2021-01-23 22:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 78eae070f03942c0122e9fd3111e56bc SHA-1: 66302a1c9e4cda41655cc1d41dc44e756f7deec3 SHA-256: 7e8ebd9f1df947d3df601e6bc581e2b53a6181da9228c91501137e3e0daf9745
186 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, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious activity, likely aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=youtube+space+nyc+tickets PDF link annotation
    • https://cdn.sqhk.co/ziveluki/gh3je4c/horror_escape_games.pdfIn PDF document text
    • https://kajugolake.weebly.com/uploads/1/3/0/9/130969904/2854920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5ffc8e1b4b376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fd1fb186fcc8.pdfIn PDF document text
    • https://xeziguga.weebly.com/uploads/1/3/5/3/135392729/1090672.pdfIn PDF document text
    • https://vemekejafor.weebly.com/uploads/1/3/4/0/134012611/bafce.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/df1f0f76bb0121d.pdfIn PDF document text
    • https://kesetemokeze.weebly.com/uploads/1/3/2/6/132682820/napidajizej.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/vefaxarajusaka.pdfIn PDF document text
    • https://vasukoxenubepez.weebly.com/uploads/1/3/4/4/134475355/nigimezu.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/zakosamolot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365600/normal_6009a3f454383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://refubexat.epizy.com/mbstu_admission_circular_2017-_18.pdfIn PDF document text
    • http://lugirike.epizy.com/tekinujeverusesiriw.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/43398281052.pdfIn PDF document text
    • http://nolumuj.epizy.com/84085680607.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/kusonam.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_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 5064 bytes
SHA-256: d1bc1d852ca4fe22d8cda0e2c12a4ce0ad0d76f9d6f99408bef1bd8222c3aeab
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 10276 bytes
SHA-256: fc461ad215adc55bffcb91a4f1f7e6906661f4eaaa8c8d26882ea3fdb5ab8500

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