Malicious PDF — malware analysis report

Static analysis result for SHA-256 652d001901b6e268…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 00:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f780a77cdbbcee8167ed098d396ad083 SHA-1: 8044ea349d30d71296e335f42cbef108252da406 SHA-256: 652d001901b6e2683415c565b722353ea8fb3a52bf9ff4ed427ef15036ec9a92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and URL analysis suggest it's designed to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609aee13310cd---xotexujozifodepeg.pdf In PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1087e1cc422f900840ee65a66d38fdb4/radosek.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/tekuxapogerilopijegof.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608491f3d64e0---duziratapemini.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c549981befe---birodipakemixuwivepap.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/suniropobesi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d03c830b6---liwibiniregagofidezifag.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/53536508471.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/zemewawurepanajerireg.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/863ei77bvtffthpi8ke02e4be5/fukonakejimuvawadila.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/tr1fa941iqvnjf78osjj246prv/xozubilifofosewupidusaw.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/38683929091.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77f6cba194---guvodopinureputesa.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/nexatesojanukevitafav.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/1eqafsjstenlr5qedvom7trij3/67673097279.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3oggm7tos19pgb2d72eiqbvca1/91914650794.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e40b78bb---67802000429.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/56311209621.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/11ba3f9b0f626cbce5d6d5328feabb82/kiwojivimejigip.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/27a7a79dafb4b442619b71aef4cc1ef2/duximajogojezob.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c64c4e49e---73435494043.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/36u6len5one71qhaclo6pf0kl1/91425142128.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/abc66e8d4fd8149e1574aa6f6680ec11/85387649976.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/84sr46ad5huf1r8gsq5omt9jtg/nalumisiduxisepuzet.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7370fe85d4---8165164220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=oop+insurance+meaningPDF 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_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 17276 bytes
SHA-256: 754923bf51ad8fd2b99aef696e89f6f2b6d3c1c829a3e7d0399d989b752c1f6b
font_01_sfnt_off000125b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC7 10696 bytes
SHA-256: dec48d88f62b8ada90321e84ec1a9cf768c9aa4877b76fb579cc3d7c7ebc5e72

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