Malicious PDF — malware analysis report

Static analysis result for SHA-256 9709b858478acbf1…

MALICIOUS

PDF

72.2 KB Created: 2021-09-01 16:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8747611cbf16c95ed93bd4bfedc3e94c SHA-1: bcf7bc37116df0abc598490cbbdffc644e20b226 SHA-256: 9709b858478acbf1291efc8f44482b023312b3c3ccfcb54d98ab474eb6700fc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://allytemp.ru/uplcv?utm_term=we+the+animals+book+review PDF link annotation
    • http://kiuruvedenlukio.fi/tiedostot/file/xiguzujibuzaj.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0b1da5882dc83966a31ef045526b50b2/sikuvijexugadafesewenidid.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/fuxitutubunibotokomo.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/24011645689.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/xemubaniponu.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/badokexisupupaxipavu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d43b4ec37---zisiledumi.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/57634185286.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160967382b5e2f---moxuzijewanezu.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/92110578401.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/66347149609.pdfIn PDF document text
    • http://pronobile.de/catalog/file/68057470812.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/875vunh8u1ec0n8jccgkromsri/kunesiwutuvoxuvegimodimu.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/759a75f57cc7ecbcf71082ba942b9d95/sonabunifixagabixibe.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126006f10045---garuxid.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/diresalufoj.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/e8c668a4be72e556586c3fe956e9940a/fupuwow.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/zuwomox.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/81776504687.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/papidiko.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff035e0a5---mixesodojefet.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94f3bcb45c---xaziruwaniniri.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/80715785780.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/55420924326.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_off0000bb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0F 15660 bytes
SHA-256: 9085aad8efd3d8c4edb1785860bd914ecb8ccadb9581242bfca04c5974027ff3
font_01_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 10752 bytes
SHA-256: d50e015238f6274c0c2121d67f36b1e9f6ec18cc9e7f2bcfe7b81ceda3b23def

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