Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ae51279d5cd1b0…

MALICIOUS

PDF

63.2 KB Created: 2020-11-19 14:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 703201e087eb85dca61a17c42ace80fb SHA-1: 210a6be0516b2c50dda7da728ab34ef956088ecc SHA-256: b0ae51279d5cd1b0ecea45ebc4f14a10f6f9b8273022e278099fb209b9436e4f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a reference to 'The purge 2 in spanish full movie', likely a lure to entice clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://traffking.ru/strik?utm_term=the+purge+2+in+spanish+full+movie PDF link annotation
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/rujotowokowagobepitu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/vibabizuzikenuf.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/73fac736501.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/1465629.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/niwujedaxaluzi-joturoroz.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/nodelisimef.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/dusir_dokat_fokutulovoleg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5f9041f47c4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f8dc545e4332.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/xaginedizaxodadubomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a9648c-979d-4906-979b-66b848c4b892/luwojufirik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4e7b8e-6478-4838-926a-113c92647a9a/sore_muscles_all_over_my_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b85a24a-b7c6-4d71-843a-291814ca1cc5/56088548939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58769533-72c1-421d-8426-205b5d3233c2/zeruroboxevebisixuru.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_off0000b74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74E 5456 bytes
SHA-256: 89ef7b7bfeaae5bd75ab47f1e7dccebc81abc6e3d6e9e554a4ff0d15c4e026db
font_01_sfnt_off0000c9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C4 11220 bytes
SHA-256: 1f865a9b3a8255a94b1d0c98d555de52cb4d6bd7ba15245ab135e5971a062478

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