Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce47a2bf55db1431…

MALICIOUS

PDF

65.5 KB Created: 2021-03-08 21:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd0e310c64ab1c53296889d0b45c9c5 SHA-1: 4b24349bb72a51b485110552b761f7733a4edff3 SHA-256: ce47a2bf55db1431fd7e1542fed4b7d5879363a02d991c588315d3aad62f05de
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs strongly suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7994

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
  • 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
  • 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://xajibur.ru/strik?utm_term=how+to+know+the+number+of+atoms+in+an+element
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/witufexobezu-govezug-napudujepavez.pdf
    • http://sevezor.scienceontheweb.net/how_much_does_a_john_deere_4400_combine_weight.pdf
    • http://jonotijero.medianewsonline.com/xezisimefu.pdf
    • http://fitdieta.com/thinking_out_loud_download_mp3_direct4w2at.pdf
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5ff77fae60ad5.pdf
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/makaj.pdf
    • http://probmaka.tech/facebook_video_er_online_720p5ymk7.pdf
    • http://xteenware.online/23844148060yr873.pdf
    • http://dosijefa.mypressonline.com/74989189847.pdf
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/mixerodo.pdf
    • http://verifedform.com/83194150970dfhu9.pdf
    • http://gatorama.fun/16434894232qxs1z.pdf
    • https://nobozemesatib.weebly.com/uploads/1/3/0/8/130874372/aeccf.pdf
    • https://cdn-cms.f-static.net/uploads/4463559/normal_603e2658eb1e3.pdf
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/benuxesizis_fupiwijukupa.pdf
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/8261ebf30a7427.pdf
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/voniforujerisujanobo.pdf
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/6404903.pdf
    • https://xizevidunofi.weebly.com/uploads/1/3/4/3/134321119/fipof.pdf
    • https://xofezariro.weebly.com/uploads/1/3/1/8/131871505/1bd0bac224a02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://davofunup.onlinewebshop.net/kajokoganetumigedazixos.pdf
    • http://nukilaba.myartsonline.com/zajulebavisufimuranis.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e97a.bin
4db380374d82e3a0febfd7dc7b14cb858c369a96eee164eb692eaec56d332a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 5264 bytes

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