Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8346e0d3aa57ff1…

MALICIOUS

PDF

84.1 KB Created: 2021-03-12 03:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1e14c8b07574e23e56338dbfb69ba84a SHA-1: 118991e8df12ba2a8cf731cc0b518f14797788e3 SHA-256: d8346e0d3aa57ff13718f0b8761da6cfdaed8d2d3b5cc0049699d44679900c3c
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, leveraging lures related to lottery winnings or parcel deliveries to entice users to click on external links. The presence of a large number of external links, many hosted on disposable domains, further supports this assessment. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xezojetit.ru/aws?utm_term=how+much+aid+does+africa+receive+per+year PDF link annotation
    • https://cdn.sqhk.co/letareximo/blxVsNe/gun_fighting_and_war_sound_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WPTsuAr/fadovubojiboxurubuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/iarCphd/tamil_stylish_fonts_copy_paste.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/maluwoxajolusitolu.pdfIn PDF document text
    • https://danuxuzajuzawo.weebly.com/uploads/1/3/4/7/134768569/4057133.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/gdSjcFM/27810278681.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/Igcjfib/gold_silver_price_latest_news.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/fVgchfY/kubicek_name_origin.pdfIn PDF document text
    • https://vaferevipesefur.weebly.com/uploads/1/3/0/9/130969420/tumubesozejini.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/27e298d47c2c.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/hihjfha/55891767491.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/d2836be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lirepotinemos.rf.gd/very_hungry_caterpillar_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b62eb7-30a8-4949-86af-1a1027b60fb0/ximijufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde21219-b2c6-49b9-89d9-4cb639c7408d/18.5_briggs_and_stratton_engine_oil_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/41894045085.pdfIn PDF document text
    • http://zoletafexogixa.epizy.com/nofudeseb.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/76168331473.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_off000107d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D3 5580 bytes
SHA-256: 92bf37d88f399f44e5cc49d8b8c3cdd4ce0c0c5556df92f32ff10f5203c21f80
font_01_sfnt_off00011ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC1 12256 bytes
SHA-256: 3b28343bf4bb7e1b43ebeab24d458c0f9a4ee7513653ac53c0b6ac24c5b6c558

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