Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc14e883cfb41064…

MALICIOUS

PDF

102.6 KB Created: 2021-07-20 16:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8147577e8663688874291d27cb8795ad SHA-1: 8f0c9733300e17b254a9c68eacc95fb8ad6d2b3e SHA-256: cc14e883cfb410649cfcfd68f0cb0f2ecdd40067d60f5d79781c88be4e535111
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links are likely intended to redirect users to malicious content or phishing pages. The ML classifier strongly indicated maliciousness, supporting the link farm's suspicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 5

  • 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://www.morrisjones.co.uk/EditorImages/file/83456362288.pdf In PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/74566560711.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1fb4da6d3bd412b7064a1bdc2b96d533/42407387600.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ecb64cc0e---junix.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/konag.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac342d9c82e---11835009405.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/rinixonusajesamod.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/39242004443.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/vozawuromawa.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/46385277445.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609319aee3a76---gopumijipilunute.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/duduzenojenofokonuj.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/8979589113.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/85851398320.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/12dba17b162efd5b01102591edb00dd1/94184320975.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/vowukax.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/xugupaxonoriji.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/wilafosa.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/47901942432.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/51191701452.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/goxezosofakedi.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/nakajadidim.pdfIn PDF document text
    • http://e-hane.com/files/44995140960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=love+by+chance+s2+ep+1+eng+subPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 3360 bytes
SHA-256: 34669157c285b0615c3dfaa1de5011f3b92c15a813746d63b45e18928cf7239a
font_01_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 19740 bytes
SHA-256: 77ab400d722a11246b45b314e9ad68ca9f7c258099b46c219d553d257bea7ae5
font_02_sfnt_off00014470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C81 16416 bytes
SHA-256: 9a6df5503936ab89b1c2e92ebab13f9554105f14dcc1752bfffa8f18f9929252
font_04_sfnt_off00017319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17319 10868 bytes
SHA-256: ac98c2efb2af28cfc945d9eec95261ef748f43e4fb4f077da7f4065e3d6d59c6