Malicious PDF — malware analysis report

Static analysis result for SHA-256 2add63a8cf2755c4…

MALICIOUS

PDF

80.2 KB Created: 2021-06-02 10:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9917de63c9174d4ab52b15b646233de SHA-1: d3050d4deba544d8c5caddfe4d747641e8b9da73 SHA-256: 2add63a8cf2755c4dec4cc756de0db059bc19bae9e99f96ea3a90000eeefc2b3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The PDF contains a large number of external links, suggesting a link farm used to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=nhsggc+palliative+care+guidelines
    • https://kotogafisix.weebly.com/uploads/1/3/0/7/130740127/44c28d15fe.pdf
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/zoxezezaxopasedu.pdf
    • https://jesabison.weebly.com/uploads/1/3/4/3/134379325/sezuduvofifedujovo.pdf
    • https://govenovu.weebly.com/uploads/1/3/4/7/134701044/d1b9442.pdf
    • https://cdn-cms.f-static.net/uploads/4468253/normal_6031b74110adc.pdf
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/5261250.pdf
    • https://xadebunurag.weebly.com/uploads/1/3/1/4/131454816/dupalexeg.pdf
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/6477714.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_60532071d038d.pdf
    • https://duzozutilitu.weebly.com/uploads/1/3/0/9/130968921/6866534.pdf
    • https://waponalafax.weebly.com/uploads/1/3/4/5/134529016/sesetagak.pdf
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/6603693.pdf
    • https://cdn-cms.f-static.net/uploads/4366978/normal_600e8931d7c34.pdf
    • https://ligotexodov.weebly.com/uploads/1/3/4/4/134488860/patagunububaves.pdf
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/13e99e460b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6d269709-fbf3-4ac2-8e1d-a6e55fc1dace/vatawazepupigaxowuxa.pdf
    • https://uploads.strikinglycdn.com/files/979e3ac3-d21e-463b-a9da-7495783f7ae9/ac_circuit_analysis_basics.pdf
    • https://uploads.strikinglycdn.com/files/15490480-4062-4c67-814b-c8f9be93616d/begomuzipigepijikugo.pdf
    • https://uploads.strikinglycdn.com/files/c12998b6-a448-49ee-8058-887debaf6ee5/27553144173.pdf
    • https://uploads.strikinglycdn.com/files/952013d7-b802-4058-a9b4-262f57b32003/sofurozararupawenejisox.pdf
    • https://uploads.strikinglycdn.com/files/65459ccb-8f51-4728-8556-55dcfdb4c9d5/blockman_go_mod_apk_unlimited_gcubes_1.26.2.pdf
    • https://uploads.strikinglycdn.com/files/0456e455-321b-472e-8671-09bed54961e9/42725370486.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee63.bin
3b08ad502fbbafeaed1389e11c3b9b38f18a8011ed6cbb2ee57d7b956e65eaa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5136 bytes
font_01_sfnt_off0000ffd9.bin
78197666a1bef780c808c727cf7424b0ebec5a0c3cd1d74eec8868fde39e1dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 10876 bytes
font_02_sfnt_off000124ff.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 4324 bytes

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