Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70630830a42bafe…

MALICIOUS

PDF

80.0 KB Created: 2021-07-27 13:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 977e0d55aeef1cf5f9892fea75312554 SHA-1: a9c47c554b65b260de8533262e9709db34b56372 SHA-256: e70630830a42bafed35c2d97b6dfc25fb813092d4dde3fb936dc5c8029531f15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links per host indicates a coordinated effort to distribute malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c226ca80f62---42096692890.pdf
    • https://bursaangka.com/contents//files/vopovajujob.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8950fd4c536776457f6fa1b216ecf6f8/bugegixodasoz.pdf
    • http://share-world.tw/userfiles/file/ponegorawuwuxeni.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda5be09448---dusen.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/9r0stg1g5s21jn70f70ul3oip5/61896724373.pdf
    • http://jpcadonate.com/clients/4/48/4863a0bac697dd4b44f4a1b1fb44835f/File/vonudinixaruvuvor.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/zaponevibaxapizu.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/2ec63f0711ca9092c9ef0d85d135c7b6/tujijubusakonipedin.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ng0le5mrqquaa9bt02b36bprdm/41571730780.pdf
    • https://flexi-cms.com/uploads/file/kufesifewijaborizivuda.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/wojudofobe.pdf
    • http://mulroyenvironmental.ie/userfiles/file/21400649525.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/gudikafafukikejuke.pdf
    • http://wjcopy.com/upload/files/93934173692.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6f67bb240---wibuvukopulirini.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/692b2230c5d454ace64e777edcc3eb64/63720984712.pdf
    • http://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/mesepazufuwutitona.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d7073038b---kevujodoba.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/1f3b055c799ab90fa0c661664bc17f36/jevobalovimil.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/5f83f0dbbefb5e0179416907aa56cec4/55513049387.pdf
    • http://dcbestwings.com/uploads/files/bakakinowijuragiruvabe.pdf
    • https://banghenails.com/upload/file/45512032790.pdf
    • https://5udua.com/contents//files/fimomegovuzuram.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/33d009f7486f15a179e6cf362f444489/tifatexujogiz.pdf
    • https://cottonweb.net/userfiles/file/zezibuluwaxejuzewatan.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hop+ball+3d+apk+hile
    • 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_off0000d03f.bin
6e07a1375dd2553399704909c6c3902967f48f6a209651fe7897e863bab1b3dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD03F 10416 bytes
font_01_sfnt_off0000e7a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 16792 bytes
font_02_sfnt_off0000ffb7.bin
63c8ffdf0860965ed5f35672c79ecff5de5dbb0767b8b5ffd7ac336d82d9960b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 20240 bytes