Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e62f8f8ea9ad6e…

MALICIOUS

PDF

92.1 KB Created: 2021-07-05 06:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3da20582645834c5d7a2a58ae30d5cd9 SHA-1: c21d7aa56cf6efaf5c5fb368bb65bcd26d3b05be SHA-256: 75e62f8f8ea9ad6e88383fff800e48791ae2d6cd07b329e1ddf063525b933949
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wastran.ru/uplcv?utm_term=self+efficacy+and+social+learning+theory PDF link annotation
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/2cd249e4fc3b463950f5c980c1aab05c/koxamijozukom.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/gilogiraterowawebizitiseg.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/kadavug.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/wabarudepipitegopus.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9bf9ac02ce2e46743cc7aed8783cfd66/64519257435.pdfIn PDF document text
    • https://egca.fr/userfiles/file/radepuwirowo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160975399997bc---dewizebajo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afed061ed0a---gekazo.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2dof5sd78n8gjs9l51kj0g6694/rogujigedonedopib.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/63b73369e17fba5cc6e4870373bafb02/rolivofipufakorizilil.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/65540704047.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/e5b77fd5bfd2a2ea86ff815155dbed98/13647201572.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210608234610.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/gucsu5jfo402fm2f01bm9b1sfa/95423121631.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e244f4730f8---73201015755.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021628191539410.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae5105e38---zinexeviz.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072dab9ebf27---watunaji.pdfIn PDF document text
    • http://boldogelet.hu/media/13546264455.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/80936986422.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094a81a430fb---21341296939.pdfIn PDF document text
    • https://digireg.cn/upload/32267415240.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/40314000625.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/sv814pi1ip8id6mhk16s1c754r/visopulikimepanaseni.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_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 17292 bytes
SHA-256: 23fba9a421b5ab1e1fabd8b95ff9e3d0ef0057242eac2ad783d5ad9a4345d27a
font_01_sfnt_off00012ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 10944 bytes
SHA-256: 86146d2a804cf948e38695efdd243e670876f1493e924e63274672e2420ac12c
font_02_sfnt_off00014913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14913 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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