Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f11d49ada4e2904…

MALICIOUS

PDF

64.0 KB Created: 2021-03-01 14:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4dd2c01ea1fd5e3c74c995a692c5d24a SHA-1: 048e12dc659b04c265318221b4dd84c56deca79f SHA-256: 0f11d49ada4e2904a557afe7d82aa745fd1b54adb03a3133b9a5eff4eab4159d
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting or domains associated with link farms. The heuristic 'PDF_SEO_LINK_FARM' suggests the primary purpose is to generate SEO traffic or distribute content via a link farm. While no scripts were explicitly extracted, the presence of numerous external URLs and the nature of the heuristics suggest a potential for distributing further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8273

Heuristics 5

  • 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 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.
  • 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://jottigo.ru/award?keyword=high+probability+trading+strategies+kora+reddy+pdf PDF link annotation
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/9cf34af.pdfIn PDF document text
    • https://baduninenivogov.weebly.com/uploads/1/3/4/5/134589003/xabetezed.pdfIn PDF document text
    • https://cdn.sqhk.co/soboxuxafiso/gicjagc/86089138625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fcf6e8a4550e.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/losaniguderafux-loromibutonu-zojagopa-gubasazo.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/pezezematoxobiwufozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_6028e90b1cc68.pdfIn PDF document text
    • https://xefagopabori.weebly.com/uploads/1/3/1/3/131379938/gujikekukaduresuroto.pdfIn PDF document text
    • https://kozugirufeji.weebly.com/uploads/1/3/4/8/134884007/bdf92dac.pdfIn PDF document text
    • https://diruwogedow.weebly.com/uploads/1/3/1/3/131382439/joxukepu-zisidareritig-romak-debabisemi.pdfIn PDF document text
    • http://pubopogebam.22web.org/gugizitudulisulugena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_601c5fa48a6b3.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/fitix-loxovigokogorej-meloxewagodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_60028498844ee.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/UigPhip/just_kill_me_3_mod_menu.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/kuzutazutamati.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/sedowedi/lumazanepe.pdfIn PDF document text
    • http://wivowutone.epizy.com/finding_slope_worksheet_grade_8.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/nowisasif.pdfIn PDF document text
    • http://jilovimox.rf.gd/design_of_steel_structures_notes.pdfIn PDF document text
    • http://wiximevisek.epizy.com/kindle_app_android_not_loading_books.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_off0000d227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 5572 bytes
SHA-256: c41de2c2357768d196e192cb4d741df8ea11526c1d7326d5e21c8892faec2943

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