Malicious PDF — malware analysis report

Static analysis result for SHA-256 270d41f6fc125643…

MALICIOUS

PDF

101.5 KB Created: 2021-05-24 17:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a8a109d883dde5c10662b8f87c18a3c7 SHA-1: c57b992c509d0b83cdb847dc3f0d3816865a5b8e SHA-256: 270d41f6fc125643d4e49645412cccd3cad2b0ba2f43de625f6866a4a2a1d2c7
196 Risk Score

Malware Insights

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

The PDF file contains a lure for a free registration form template, directing users to a suspicious URL. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or redirection mechanism. ClamAV and ML classifiers indicate malicious content, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://resalured.ru/strik?utm_term=free+bootstrap+registration+form+template PDF link annotation
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/gekujidaxajejivaj.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/0a54bc3b02e4bca.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/lusubelov_kupafa_zotusiwaf.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/c5a11cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_6016d2601281b.pdfIn PDF document text
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/7462327.pdfIn PDF document text
    • https://toviwapomini.weebly.com/uploads/1/3/4/7/134727984/6a86bc036edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_602148e46805c.pdfIn PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/6572682.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/suvusikelozefujakas.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/kedafopibapaperize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xirixepo/97705277012.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/gakimokimokafib.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/mixitilupuxajukinowutil.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/88219025601.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/digavimaxaxegavetatuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/batik_mega_mendung_format_cdr.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001432b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432B 5104 bytes
SHA-256: 4b726378934e5dfa8e219b9411380616fa0c5f9ddb357a93dd365fe1f23eba4b
font_01_sfnt_off00015466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15466 10516 bytes
SHA-256: b3b792a0a68d19dbb512655f650e5ea548690d1f41713337171afb92236b5193
font_02_sfnt_off00017858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17858 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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