Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbef78e1f98b67f6…

MALICIOUS

PDF

94.1 KB Created: 2021-03-24 13:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bdcbfdb4120fd08b1263d66ecc5696b SHA-1: 218f4a36505c8daf7a284518c0886a1cd814c09b SHA-256: fbef78e1f98b67f6e7ce08a384ee5783afb22a8c2dbd7f630a414a955dc2d982
124 Risk Score

Malware Insights

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

The sample is a PDF document that leverages a common lure of "Ethical hacking syllabus pdf" to entice users. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7148

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=ethical+hacking+syllabus+pdf
    • http://faxadiweruxu.22web.org/fenufinil.pdf
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/5802732.pdf
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/2433337.pdf
    • http://nokasosozigof.mypressonline.com/ap_style_guide_2020.pdf
    • http://foxiwirilavisan.22web.org/lumavekogi.pdf
    • http://jebebixazonutug.mypressonline.com/38314531645.pdf
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/1498514.pdf
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/gidunesi.pdf
    • https://lapokatodulobak.weebly.com/uploads/1/3/5/3/135347459/difinudo.pdf
    • http://pudumalezedokav.22web.org/prezi_sample_templates.pdf
    • https://xenesadu.weebly.com/uploads/1/3/0/7/130739949/5e7056abd17249b.pdf
    • https://jevalibiku.weebly.com/uploads/1/3/4/2/134266190/pegim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wegatanubuguze.rf.gd/closed_cell_flotation_foam_sheets.pdf
    • http://jurizamumi.myartsonline.com/45530674051.pdf
    • https://s3.amazonaws.com/tawosutosuxi/namatajobafitogezimat.pdf
    • https://uploads.strikinglycdn.com/files/f8676ef2-cbb6-4fba-934e-82bccb90907d/26557208626.pdf
    • https://uploads.strikinglycdn.com/files/6feff157-479e-4aca-b65a-4a9840df14ce/how_to_light_a_duraheat_kerosene_heater.pdf
    • https://s3.amazonaws.com/sefabe/lesimojese.pdf
    • https://s3.amazonaws.com/taturi/schlage_connect_touchscreen_deadbolt_with_alarm_setup.pdf
    • http://wuseraxapej.epizy.com/46817672461.pdf
    • https://s3.amazonaws.com/xakajoziwibi/wurafazubuxetanovosovo.pdf
    • https://s3.amazonaws.com/sorapobuk/linkedin_logo_for_email_signature.pdf
    • http://wotidupodugi.myartsonline.com/mofufuta.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001469c.bin
68c7a2766232742d275a2f06be4b63e6ef0651e9e34604e57d519ba5af9863a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1469C 5584 bytes
font_01_sfnt_off000159a3.bin
cee56aaeaf8108a64d3db51928a632d41393546b24bd0999229099140fa4ed4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x159A3 10672 bytes