Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d165175fee133e3…

MALICIOUS

PDF

75.2 KB Created: 2021-04-06 21:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1f8e0e1781883048d092a22936c72f48 SHA-1: 234d45842eeddb93a3916aab2722adff6017c30a SHA-256: 4d165175fee133e3c25672e9c99c58e80b973dba02b8ca9f12d307364db406b6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm or spamming activity. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the presence of numerous external URLs points to an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=are+all+verizon+phones+compatible+with+straight+talk PDF link annotation
    • http://baderezu.scienceontheweb.net/punctuation_worksheets_for_grade_4_with_answers.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/what_is_dataset_object_mcq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_606c3de5c8b3e.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/gotuderawase.pdfIn PDF document text
    • http://womaruzufoxila.iblogger.org/chisholm_catholic_college_uniform_shop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fee81058fa7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekaxogide.epizy.com/rofezidogorajawirotifonum.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/cfa_career_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/jamev.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/zitokojifefuk.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/pakuxepexug.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/super_shredded_8_diet_plan.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_4244ff0b3a5e4fb1ad145c26431542d7.pdf?index=trueIn PDF document text
    • http://sovizaz.epizy.com/85048689616.pdfIn PDF document text
    • http://kadanokadija.epizy.com/gugataroxigod.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/64134892957.pdfIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_4a660335ab09465eb1099f6efa55dd0e.pdf?index=trueIn PDF document text
    • http://roxujewov.myartsonline.com/72833749000.pdfIn PDF document text
    • https://7c2a7e5f-de2f-4207-b822-d971188c697e.filesusr.com/ugd/17f605_bbc65e91a69f4d9da92daf96ac9c2d4f.pdf?index=trueIn PDF document text
    • http://tifomoja.epizy.com/15107451296.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_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 5744 bytes
SHA-256: 97777b9ce4feb298d88d72dbc33f1203ad233492ad186287c1813f18418c1c64
font_01_sfnt_off0000f6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 11248 bytes
SHA-256: a3e1027897d056a1037cd9eff17107ab444400793ee3966d4b4fc8578e0bff1f

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