Malicious PDF — malware analysis report

Static analysis result for SHA-256 3039307530b18317…

MALICIOUS

PDF

68.8 KB Created: 2021-02-24 08:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 46e783c24b95f6f5d5f944151fb8e325 SHA-1: 2002398815ff80e7ba150ad72441d00483222cdf SHA-256: 3039307530b183178c38a3dc67f599ae51f533cc5adda2eb7363161f7661b454
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 to PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://druttle.ru/wix?keyword=redstone+elementary+parent+portal', is presented in a way that mimics a legitimate parent portal, likely to trick users into clicking. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

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://druttle.ru/wix?keyword=redstone+elementary+parent+portal PDF link annotation
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/7742974.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/978ebf2.pdfIn PDF document text
    • http://zuluwububoke.22web.org/crm_software_full_form.pdfIn PDF document text
    • https://gigatadozewat.weebly.com/uploads/1/3/1/6/131606492/9369719.pdfIn PDF document text
    • http://legalvictory.group/progressive_insurance_card_template_fillableliesx.pdfIn PDF document text
    • http://wavarev.22web.org/89248588517.pdfIn PDF document text
    • http://telgrm.site/4437655654873znj.pdfIn PDF document text
    • http://thepropheticapp.com/270757174212212z.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/xamibudasagas/15938297030.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/25860314983.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/fexol.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/tufode.pdfIn PDF document text
    • http://tebalakafepikob.rf.gd/53587631467.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/aashiqui_song_bestwap.pdfIn PDF document text
    • http://wodagewuxaver.rf.gd/gezatinaket.pdfIn PDF document text
    • http://sokivuj.epizy.com/blank_lesson_plan_template_microsoft_word.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_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 5216 bytes
SHA-256: 2f2c482d06a69d151a5757567ee665441de3aa2ffeceed388644bc38914f4df5
font_01_sfnt_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 11220 bytes
SHA-256: 3d2f0f52ab4c6a9e9b914783d89de4118874605d3211fdf68782b7f2904fe6c4

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