Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0e574532d4c0e4…

MALICIOUS

PDF

109.5 KB Created: 2021-06-27 09:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 26a0274807d4dd9c00a3fcc47d721777 SHA-1: c0a1e1dfa593d22aaf7a33b0e32f8025e517a336 SHA-256: 4b0e574532d4c0e4ed4658235b8117050cb38be61f52fff4baaec60c780e76f2
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://vasantviharproperties.com/userfiles/file/56784818980.pdf In PDF document text
    • http://capri.lt/userfiles/files/35315591310.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/55265267837.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/d7a357481a9e1336e04ca01ed83b6341/39258105314.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/ac57cfa763c9d8f6220f7c762b9f8a9f/liwakujutaxe.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3e83593fe---puwupexam.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/45582450682.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdfe07199a---rilewori.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/digixoviwu.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/f4191af76d0f8688f56110e84e68d869/wefajakisixevu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f6815c20---14590031696.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074339162546---votesudevuxexim.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cba020f8739d5b323b5a64f84c3b4aff/wijijepidisazenotujofijo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5b2a558433e3f15eeb68c71df0b39bd8/18332440942.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/s4ge3d6eiupbh8ur41lb6lvlcc/nuvarowefulevixor.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9aeb7cc9---mariroxanobirexejajajekix.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/lepuvuwumokojafi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16071620e6a3f9---33287490432.pdfIn PDF document text
    • http://orem.mn/uploads/files/48809214414.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/270822367434.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ti0f2ql4p2j2sq9n3kqugmc2m5/lebiwawitogajezutog.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d402cdeae3---demolalitigoxawelimov.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0b591b0d7---kumuxajeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=unto+meaning+in+biblePDF 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_off000140ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AE 22864 bytes
SHA-256: e9a6df3ebed52055c23de8133f3d5c1467334a7411ac5a18614ee0ef48f0d43c
font_01_sfnt_off00017adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000192f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192F2 10328 bytes
SHA-256: bbe8bab679cf7b2346edce0488c5896ca363c23fe7307dfb300d8d993001e02c

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