Malicious PDF — malware analysis report

Static analysis result for SHA-256 3065256f3e00d2f4…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 03:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85e851bcd81049c7b14b75ec98b73f68 SHA-1: 76e20407d0c29d4f86c66deb1cd2c8de33227720 SHA-256: 3065256f3e00d2f419cf378ddf11f060ee8119c5990a7aa4c0108c504bcaa754
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The presence of these links suggests the document is designed to lure users to external sites, potentially for phishing or to download further malicious content. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or content-distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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
  • 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://irlanc.ru/uplcv?utm_term=felicity+kendal+in+the+good+life
    • http://songiadahoaian.com/upload/ck/files/43776277451.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089a1f8b146a---71190864675.pdf
    • http://zulassung4you.de/bilder/file/31643643799.pdf
    • https://twr1115.net/files/fckeditor/file/52375428697.pdf
    • http://belgium-ex.com/images/blog//file/52616016390.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d727e7a7---vezosetowigatikuvikijerod.pdf
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/72876132790.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b2782936---mosafavinifulikelib.pdf
    • https://bursakaynak.net/userfiles/file/4265181032.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da73c93dd4---kukox.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/pafejexizefirafaref.pdf
    • https://oklogistic.lv/upload/file/95396565887.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42ae57a392---mojisibazekuvaxusapu.pdf
    • http://al-bandak.com/userfiles/file/jimolafuweri.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/13052cd29cd3f52d40bc601a218cf297/filijo.pdf
    • https://atlastoursntravels.com/userfiles/file/89364392174.pdf
    • https://fruzsiflame.hu/userfiles/file/90629429986.pdf
    • http://poorclarescork.ie/images/dijuwanujanawi.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778dd0c75cf---zonorasegaz.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/27d21b2437602b2c38ae182d5518b75e/fedosalazuwikak.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/48b64347821c9b6f0ef90ebcab2c6029/37696218984.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/90cdf11ca181612701fb481d58713803/8662864918.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/63161b46acf9ea56797fb39e0490d3e7/zotiduk.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0c99200229b92cd1c70fb6cdb877549b/vixowatawasurimijimemuxa.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaabacd25a---29214144524.pdf
    • http://fouladsazanco.com/Upload/file/gelovojiberojuf.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9e8e2cda---wevibivininisupafefunawe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 16792 bytes
font_01_sfnt_off00010b8c.bin
39bab0b20b8aac9345c814c0241e8fce911c6f096a444d657818c1198b05e4f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 17368 bytes
font_02_sfnt_off000138b1.bin
e08d0e7ba3e416d198e5d0aa3838931f5d183c3b0a9265997d54f820c213486b
pdf-font-stream PDF embedded font (sfnt) at offset 0x138B1 10668 bytes