Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fe25c6af1bd032…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 08:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f91634bfde85f2446e4d24f66c86a984 SHA-1: 868a18200449aa75b229ebddd5023cd4277a6649 SHA-256: 95fe25c6af1bd03244893d43c885387ae571e2a41277fafc0ca4c7218465f2aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://esistore.de/userfiles/file/xilosikobarolek.pdf In PDF document text
    • http://mousike.it/img_ins/files/76296593815.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/xiwodijiragabibuzajikatad.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/vupiwawumiredokefa.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/23296556343.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/25713084412.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/89113049788.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/8272630059.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/repabudozinikiputububufu.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/62230246670.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/21768905542.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/jizupe.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/41373274958.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/53683207407.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/8413918509.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///48332898350.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/96342697744.pdfIn PDF document text
    • http://eko-uklid.com/files/file/fusesewefasuzageje.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/nutagupaxag.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a703ed042bcbe18db57e8888c0508d61/zeluxofitujofuligu.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/4617453838.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/xerokimeneniboti.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/xetifoleberozuzijedujepis.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/vidunekewijibuli.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/gegaz.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/xapaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=can+instagram+accounts+see+who+viewsPDF 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_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 18168 bytes
SHA-256: d21c9bc82743bc3ea45d772c09ec73081fc7cdaf3eda22d70a1056c29fb9a1b3
font_01_sfnt_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 10916 bytes
SHA-256: f592e5a184ef5da955a177b12546fc47091eab37b666fb2f4746d9f4261f45c7