Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ccf8c1d6b16c0a…

MALICIOUS

PDF

97.5 KB Created: 2021-06-28 00:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1ccc2090e0f1f95346621eecbaa5a5de SHA-1: ffde00e10402306e31a87242dc730e59ccb8e67d SHA-256: f5ccf8c1d6b16c0a00ce42f2e49df022a3bd141a10956ab4e5328a01fa62e86e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://infrive.ru/uplcv?utm_term=malcolm+james+cleary PDF link annotation
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080edd1e53f8---17929539875.pdfIn PDF document text
    • http://93564497.com/userfiles/6352665125.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d705741975---sadapekilozi.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d23012d9ed6---xamijo.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fab0b7328---82706095983.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/70590251299.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/9aca3a46a3e7c82fb88e8d6b5b247721/91103016077.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/86344372769.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/87564699969.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/kjkfg3c4bn50csflvu5khfacd3/joramazikonibuvinu.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/3997951552.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/77054036966.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b33170446f---vetafutep.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/83cov095u9qniaiccb8i7362v5/72196031014.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/44937381534.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094187294fdb---fojinevomefararagos.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/wigera.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/2efdd53f546ed34e21d05cb8c5ccf556/18462084505.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/n7qs0r38u9u31e2ctje7qbjje0/55093059759.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/66331004231.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/80ucfobigitovf0trao7hfembj/tikazafumalabofopusuponuz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c95741a294b---botukavepapogurinusa.pdfIn PDF document text
    • http://fitviewer.biz/files/file/tujoribu.pdfIn PDF document text
    • https://papiratisk.cz/soubory/judikepamepuf.pdfIn PDF document text
    • 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_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 10332 bytes
SHA-256: 3936c05ca42d0e985356e81b6c4136b8587248f7b5597d85ae514f28bd311c5f
font_01_sfnt_off00012c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001446e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446E 19800 bytes
SHA-256: c0389b8e8df963355097edcf7ccbf1331d6fa2b6bebee67e9b0a69c16b283b57

Open this report in the interactive analyzer, or submit your own file for analysis.