Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12cb3d13ceb3d60…

MALICIOUS

PDF

75.4 KB Created: 2021-02-21 17:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 547586483c2e0a90c2f60c7d15dee630 SHA-1: 7d66485a31bc278cdc1e696e110dd7ac7fc898f7 SHA-256: e12cb3d13ceb3d601aee18f2a8a101abedb6111bb08a68fbaa7966044c47c3f4
96 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 pointing to PDF files hosted on file-sharing services, suggesting a link farm or SEO manipulation tactic. The primary URL, https://leonvi.ru/strik, appears to be a lure, possibly redirecting to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and extensive URL usage indicate a malicious intent to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://leonvi.ru/strik?utm_term=what+to+wear+in+court+marriage+in+india PDF link annotation
    • https://rajoligegade.weebly.com/uploads/1/3/4/5/134504333/8436030.pdfIn PDF document text
    • https://detaxenenikub.weebly.com/uploads/1/3/0/7/130776267/4043861.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/vavozakupij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_600ae81ae14df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381534/normal_5fcca463ef9ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417813/normal_5ffb301c4e7c5.pdfIn PDF document text
    • https://xigobiniliw.weebly.com/uploads/1/3/5/2/135298108/womaviduxej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fcb54715db70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456376/normal_5ff40a154c241.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/fb9a8c2fa91.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/feiiHif/sutedomivapiviwe.pdfIn PDF document text
    • https://penaveligatoka.weebly.com/uploads/1/3/4/3/134314422/kuweluzer.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/ifhjje4/parking_jam_3d_challenge_2_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/iijikhj/bubble_shooter_jungle_pop_game.pdfIn PDF document text
    • https://zububeto.weebly.com/uploads/1/3/6/0/136082076/torizilijakade-dejuwokigagi.pdfIn PDF document text
    • https://nogekapufininut.weebly.com/uploads/1/3/3/9/133997605/93199cd9d2d8600.pdfIn PDF document text
    • https://xuxoxipabixu.weebly.com/uploads/1/3/4/5/134588436/6606899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_5fdbde7ca92c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genijusemu/pibudiwenuru.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_off0000e9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 5248 bytes
SHA-256: fe12248e50e86d549c4c569cc0ac5a84d62f3822f308bfff02cd7f63033a3fbf
font_01_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 10928 bytes
SHA-256: e67102dc866c72ecf06731c4a87fef28288dea24950abb84534a2ca1ce269d8a

Open this report in the interactive analyzer, or submit your own file for analysis.