Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8dd7a19409fe7b…

MALICIOUS

PDF

77.8 KB Created: 2021-04-26 21:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a7f0a92dce47df1fe507e4573c0429b2 SHA-1: 212db37d2a68d268f9224597786a27a9518cd9e1 SHA-256: 2c8dd7a19409fe7b296773c57f8eb67df0f05d21fbb79d491ad126447fb3ad8d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://ponafet.ru/strik?utm_term=ielts+writing+task+2+sample+answer+band+9+pdf PDF link annotation
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/90512.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/juvevikavodewoze.pdfIn PDF document text
    • http://ecoterritory.store/adobe_premiere_pro_text_effectswh3fz.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/7435019.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/66851068078.pdfIn PDF document text
    • http://muvirire.22web.org/botutuminizaridufuvafub.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/cuales_signos_se_atraen.pdfIn PDF document text
    • https://wumaluruporemad.weebly.com/uploads/1/3/0/9/130969386/xurotewupejaj_sunigolovi.pdfIn PDF document text
    • http://gijixig.22web.org/spoof_call_app_android.pdfIn PDF document text
    • http://gewokonavexeja.22web.org/limitations_of_renewable_energy_sources.pdfIn PDF document text
    • http://tixshopclub.space/liwetovifigibrngpb.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/3983729.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/87564388917sl6f1.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/59595797066.pdfIn PDF document text
    • http://widaxaruko.mypressonline.com/acknowledgement_for_ojt_narrative_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefawosejek.rf.gd/dibikinituvuworaditodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0856f6e3-2180-4754-a83a-58d9a94e068a/mabojefakuk.pdfIn PDF document text
    • http://zujapataluzipo.epizy.com/jijejad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f0d6b1-116d-4518-ad45-075ad58a6488/23762088071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44460db4-c893-4078-a911-230fe46f9ca2/pijiwilew.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/28593324385.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/que_es_una_bacteria.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_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 5884 bytes
SHA-256: 31bd4f3b9bfdb80abce761612043d5a91ec68abc334d6e59f071dc5f66c7563f
font_01_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 10396 bytes
SHA-256: 3d00a0dd33b6c1f0ff88807d72580a2d7e803bf6467a0f20dcdc632ea876fcc4

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