Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f046e335f676297…

MALICIOUS

PDF

95.2 KB Created: 2021-08-07 12:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 23fbbef50e1293047df8f3231aa65795 SHA-1: 6067815ea3c145d98d7d5f088428a6eaf8478fbd SHA-256: 5f046e335f676297d4cf893460e81c3ca2a7169376066e2896a68f98d7dce659
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS uploads and disposable hosting sites, likely for phishing or malware distribution. The embedded URLs and the structure of the PDF suggest it is intended to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d135aadaf089197d11d6d47fce72e607/temutitanuwikig.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1809dd7b2d---65560319076.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a712b88b8d0---21639316535.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d78328cd618---zikom.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/9ce67128f662b78e94684608e4cf3888/31545193088.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/41414504880.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee0d43f6a---86222527181.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/49447609972.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7c11f7ce0ada4b7263bee64f9cdf6277/wesejowalonoxekomapitasu.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/i3v50kj8oi262nr516j0e6jcrg/bomisexuxe.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/74468421435.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/39714397005.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/3611380652.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/de2073c194cf1eee007d3392252126d7/1216946219.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7918bedce9fcd81db679f081f276cda7/vogudodumiderimupu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe688254b0---wejibazuvinogit.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9kpk9s9n1jckhea87g2f53d5el/42231773714.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/59b96d9c018122c111eac13315c760f8/pifenifazexazoretatuxun.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/8f0v0v2hltou9gl3ag9kc3rckt/67536434945.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/dowasamofefemukiwewi.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/v522tpugk5d6kdp8go9gf39vuk/fitobifusurowoxu.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/64280519181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+get+free+robux+no+surveys+2021PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 17352 bytes
SHA-256: f526bd46a6f7ea03cf8ba4444e1b30ee232e06807817c3cdb68eecb75632896d
font_01_sfnt_off00013b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4F 10984 bytes
SHA-256: c97d5a65b49067e3b9594cca6140172f40988accac84383daefe7308749723e1
font_02_sfnt_off00015524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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