Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a673b70dc763ec3…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 20:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b1473fef64701997454d23ea006b3087 SHA-1: 4565a4f780eab2a458ba037c27c65c90580b6bb1 SHA-256: 2a673b70dc763ec3e2fe123d015bbaa596231beeb52ea5d104635237448f4172
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites, likely for further exploitation or credential harvesting. The presence of numerous external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5175

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://lightofislamonair.org/uploads/files/javepetafafajax.pdf In PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0a9f5f014---zebor.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/kebafivufupubuwep.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/2mvmr1cq3ibdia32e48d865tmk/rapij.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/78825573584.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109162146518084.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/gefijodemikikowulo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3f0cc012a0fc70a526c3731789e27b4c/govufifajeredesoz.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/xogodapinadularivud.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a69d5677450baf1046bd07a78490a927/81118036107.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/47460920194.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/tikabit.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/85826709772.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/23059835300.pdfIn PDF document text
    • https://phr4u.com/files/xexunogufojomi.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/25822285756.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/76275901950.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/65491923818.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131682ba61d9---69158316795.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4fdcdc95de6ca53b6aaef08d2f7f453f/dukafiwo.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/85719026389.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/monuxibilo.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/pudufezefixido.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/gegedopirilu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329af4c6105---vomowobefifutuvavuzojit.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/79493096617.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/20626095971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=harry+potter+available+to+streamPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 10620 bytes
SHA-256: 84c8bd5727600ee3784412445e4e83fd333b1e07f83544e936da4ff956dba9ef