Malicious PDF — malware analysis report

Static analysis result for SHA-256 122162b351b3746d…

MALICIOUS

PDF

96.0 KB Created: 2021-07-15 09:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a730c22de7c494d0610d681e2c597bbd SHA-1: 0bbd684c6bcc5b556703eb1995dfb432fc567359 SHA-256: 122162b351b3746d340f03a47330179ef2d38bff481aee6fbfa87a60054bc97d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of these links suggests the document is intended to lure users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://aldara-latinoamerica.com/userfiles/file/xijaxexesixokiwepawap.pdf In PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddd965755---30781000133.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2fa73bb1---32247730954.pdfIn PDF document text
    • http://aimic.com/userfiles/file/33251418233.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/17649827682.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ee59dc602---56593987950.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/40a82a26713cee452c4e3974689d4e31/64472794055.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608521cb33fe0---tezizuropemuz.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/vofuvotu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083339dd38cf---benukamosetowafin.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/squmuaumpld5g0vugram9n81c2/litezujawobe.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/gubekapisapukiwijajubaso.pdfIn PDF document text
    • https://khanikango.in/file/vedibexexisopiwesijaz.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/jifemugiwefukemujabijalo.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b61ff2a5b---nizol.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fumumadabizabagavuxus.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/0570d0256934ee69d701bdaebc18ec20/61152368953.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/26678836772.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d2924192fa2---37970851589.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/3493469108.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/84833523136.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/18912471584.pdfIn PDF document text
    • http://zgic.ru/!upload/files/71874257011.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/98250080b02f94ea9a8d3d53dc4a0886/28886351160.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/xuvufalokixewogebe.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4799aa057---gegupupezoxubajepaderol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=good+afternoon+status+in+englishPDF 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_off000113ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC3 10772 bytes
SHA-256: 83f3c3a9a6ceed6c64d5f1f7f73b0ab4781888195102a7364315973dbf51314f
font_02_sfnt_off00014445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14445 17408 bytes
SHA-256: 23c1d30975866e1b75b9a9256b97b6a768cbbc08c6c2f5ba657d3a9fc22d2f21