Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0a7d5930bccf66…

MALICIOUS

PDF

71.8 KB Created: 2021-01-11 12:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ee656d7a0c709f38655f2fef5da0770c SHA-1: e4c2d6c7b80822fc0050d70752f5d0222221cccf SHA-256: 8e0a7d5930bccf66774da1cd358e1aeffe17c9c6826f7c82339249613052bb30
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 identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an effort to obscure the final malicious destination. The presence of external URIs and the classification as a link farm strongly suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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 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://trafficel.ru/aws?utm_term=suit+punjabi+1080p+hd+video+song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5ff7593c759d3.pdfIn PDF document text
    • https://site-1175348.mozfiles.com/files/1175348/building_a_chatbot_in_python_using_flask.pdfIn PDF document text
    • https://gituruledutaza.weebly.com/uploads/1/3/4/4/134401886/zoxivu_teguvagotuxeb_dujexazavivelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_5f98e88f51001.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/gihibgs/mivixuxirizaxeziwi.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/bb2b5b7ec5fa0.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/ceb57296b5774.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/cidhbjc/tizobotipo.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/837891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 5860 bytes
SHA-256: a462aeccf155be107c13bad000b1ed05b328024d4865bb324246c66783642c08
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 10308 bytes
SHA-256: 25ad3881ea56db85ff312c25c760d18b2726a80cd49cc19a85939d85b161685b

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