Malicious PDF — malware analysis report

Static analysis result for SHA-256 995f79049206e290…

MALICIOUS

PDF

67.8 KB Created: 2021-03-04 02:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 47ddc5113b23a11f9c4cad74710a317f SHA-1: 52fd0df1e39dccb67a944f89ccd707f12a215932 SHA-256: 995f79049206e2903996b352ae7a987f9ea18f4b9ffc33d777451271ed97ef4e
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to S3 buckets and other domains, suggesting a link farm or redirection infrastructure. The primary malicious URL identified is 'https://soxebez.ru/strik?utm_term=how+to+get+a+baseball+bat+in+gta+5', which is likely a phishing or malware distribution point. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links within the PDF, and the ClamAV detection confirms its malicious nature as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=how+to+get+a+baseball+bat+in+gta+5 PDF link annotation
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/dofanojamumo.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/go_ask_alice_song_lyrics.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/mebutetaliw.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/vonofedod.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/7879984577.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/goxirigafebikizikakenuxi.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/ritovumulaz_rumap_jexitod.pdfIn PDF document text
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/6654319.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/jirebonudur/bugodenakodojogatix.pdfIn PDF document text
    • http://baniteb.epizy.com/gitelatitiwitemi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/latagakezunaz.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/83390631971.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/how_to_unlock_radio_shack_scanner.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/what_does_moral_conflict_mean.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/30388838705.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/xovoneb.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 5072 bytes
SHA-256: afcb4d3348f900ac67320bafe5e17b377283f840be4a0ced49b4b1497ebf85d8

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