Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d930a3005bbc17c…

MALICIOUS

PDF

77.3 KB Created: 2021-05-13 08:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0350f2946f5bcfcdb54d04fccae26434 SHA-1: d5f3756fca484b5f3e0685bac396a90eb7874fa5 SHA-256: 5d930a3005bbc17cc5ba956551849facc9066065568e9a5345383cebd02563ff
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful websites.

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://kuzutuzo.ru/wb?keyword=breaking%20the%20chains%20of%20psychological%20slavery%20summary PDF link annotation
    • http://teritexi.22web.org/judamapokuwajunumalived.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/bileger_nevirokujopupu_zijiluz.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/public_finance_and_taxation_kasneb.pdfIn PDF document text
    • http://masanakepatarar.iblogger.org/pdf_amadeus_manual.pdfIn PDF document text
    • https://zipawigulugug.weebly.com/uploads/1/3/4/9/134902713/poferi_tator_derofusavuz.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/sodivuzokav.pdfIn PDF document text
    • https://lasakewozazewa.weebly.com/uploads/1/3/1/4/131437605/3448129.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/97be9fb.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/fibesadomube.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/ea616e45cfdc2eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dcaf3b11-26f0-4e60-b842-01857b8e1462.filesusr.com/ugd/2df88f_935c66a8cb7846239004e019023457f1.pdf?index=trueIn PDF document text
    • https://9d03b195-5c34-4993-8a23-519dd2bddccd.filesusr.com/ugd/9ac058_fc7a8c55d6254067931ef0b72dbb2cc8.pdf?index=trueIn PDF document text
    • http://wafovekideg.rf.gd/sintomas_del_cancer_de_piel.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/macbeth_reading_questions_answer_key.pdfIn PDF document text
    • http://pirumikerivij.epizy.com/kumerusa.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_6c7eb2ff7ba440f5b500e1988395776d.pdf?index=trueIn 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_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 5704 bytes
SHA-256: 5c281d968d167428cf72f74077856bd42388968d4d389bc230e50f07cd5f7264
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 12116 bytes
SHA-256: f448dbca854e2a9e3178bbd3cb3d17d5ec11fb257ce3e34fa139ca8e610ae9f3

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