Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9bab3dc3614d7a…

MALICIOUS

PDF

67.7 KB Created: 2020-11-24 20:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3dd77985bf722d41fb83f850de2caa SHA-1: d041e92b05a80f0e17fb45cdfb3abad31f79b9f6 SHA-256: 1d9bab3dc3614d7aacb84e719f6c0c663ff25beda4469fc18665497ad0fb7be6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to contain keywords related to movie hits, suggesting a lure to drive traffic to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to create a link farm for SEO manipulation or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=2018+telugu+movies+hits
    • https://kakulekatorud.weebly.com/uploads/1/3/4/6/134681497/ketusixe-pobunibutidex.pdf
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/biwitud.pdf
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/nesexanafadebikono.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10d6b7a3-7476-4745-b327-1bc8c35c95b3/zononuwufonojilifobuw.pdf
    • https://uploads.strikinglycdn.com/files/88e4b032-1917-493d-a869-2f03f70a3e18/nupopasu.pdf
    • https://s3.amazonaws.com/zobuwubedak/xejes.pdf
    • https://uploads.strikinglycdn.com/files/6c037c98-3b9e-4b06-9f3a-7ec646aab7ab/texabaraboxekisegij.pdf
    • https://s3.amazonaws.com/garorowa/how_to_get_your_website_noticed.pdf
    • https://uploads.strikinglycdn.com/files/23c11a8d-b73b-4ea9-a9b1-ac4f53990932/60322097399.pdf
    • https://uploads.strikinglycdn.com/files/2637da84-0cf5-427a-9ef1-6e3635351d5a/ronufepusitanezalilu.pdf
    • https://uploads.strikinglycdn.com/files/cca4f893-4dad-4aa6-b941-302f897924ad/17390814533.pdf
    • https://uploads.strikinglycdn.com/files/555c0c34-6535-4160-aadd-bc062225ad57/garuzagutelo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9d.bin
77713b4571d689b712f3499d98e04520414ddabbb075d50e88966153d8a00eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9D 5276 bytes
font_01_sfnt_off0000de78.bin
7ed9c39f379b8e7a8521d5e68df78540426f531c37ace787e75a773eb68319cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 10492 bytes