Malicious PDF — malware analysis report

Static analysis result for SHA-256 e068e8e2d572315d…

MALICIOUS

PDF

79.8 KB Created: 2021-07-27 21:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bcc9c0545f2ac9daed0d40bb7420e347 SHA-1: ef43e471e6c0c327b87024a6bccbb60b088fecec SHA-256: e068e8e2d572315d0cbd3a47f14b07cfdd1520ecee65c4463a07c9b30d652b31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/f229903ed920a2e6b56c48ea3664d096/50088108803.pdf In PDF document text
    • http://foodchemsino.com/d/files/nuzagep.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/46967485025.pdfIn PDF document text
    • http://alltechsro.cz/files/jatoperenaresumodul.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/71560401819.pdfIn PDF document text
    • http://agavietnam.com/img/files/84330029600.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fc35682c9---85915235598.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/70699414033.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c308c8b56ee---pazipatazetutisazixowope.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c164ed7fbeb---gidanesubakutazibaremu.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/j9kvruc1u72govcpd2j6678kc7/17736136632.pdfIn PDF document text
    • http://contelex.it/userfiles/files/kovidikuv.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1344a72104d9aac5f5eec6869c8c8040/melomixitefogi.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/goromulijo.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/19344418006.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/migotilokeruruwabewupa.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/70393505941.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160afce98a9435---54468013374.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a6a7063a0c9b8eb353ebe7270a3834ed/4660138775.pdfIn PDF document text
    • https://bataretak.com/img/files/file/bujulolegodaxafezegosoxo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/156sse5ccp4hmadn7nm5see73t/27122313173.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/30/file/20210530_123252_197.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/85858441284.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/613892d07de2d288858884ffba65499e/61802445957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=les+mots+invariables+cm2+exercices+pdfPDF 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_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 18824 bytes
SHA-256: 507cc1c7cc78fa3903f2861853861d8b29f02a03c23cd354f570ba2ed6214b2c
font_01_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 11164 bytes
SHA-256: 6c30df32598415097b7f9c36bcb54be98f3ddaa9ba8c8ee906ecde6b21844bb5
font_02_sfnt_off0001190c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1