Malicious PDF — malware analysis report

Static analysis result for SHA-256 e074f3db04ab5fe0…

MALICIOUS

PDF

70.1 KB Created: 2021-09-14 01:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 324f6fc690f21e8f4d4e0aca40b38c06 SHA-1: 69b127f55b2d5088929c7eb0073e801a881ff44c SHA-256: e074f3db04ab5fe038e6067386c89d89a21b8baee2dd2128089f6abfeddb50b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a likely attempt to distribute malicious content or phish users by hosting numerous links on disposable domains. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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
  • 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://mmtours.si/uploads/musuvuwimoxalajon.pdf In PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/tesofamibunazevavowoj.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/6076210415.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/50421713125.pdfIn PDF document text
    • https://aromamarketing.md/img/files/40022934978.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210902_7D177C7A0F7DB79F.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/tijafuretagideze.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/pajunajizawu.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/24152307063.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109091149457659.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/52495412202.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/rinajukedide.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210905022715.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210901155638_kdaz5o.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/46678208693.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/febusuwu.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/ramapozugenodeka.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/lawegerubunapupu.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/sabixojuzelujise.pdfIn PDF document text
    • https://medpressa.ru/files/file/marowafu.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/juxawapimajufanujif.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/69443862300.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/lufomoxozawoka.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161356b1d90934---67574865922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mini+militia+ghost+mod+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05C 16584 bytes
SHA-256: b93ddc70034f0aa8ad49ca29c87c3f8750b084b6b4e7ec319dd1ec9d6ab6721d
font_01_sfnt_off0000dadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10692 bytes
SHA-256: a7c84f5f9a0d20337442ac1cfd93843ce0016fdb49293f390afcb4c2e23608e3