Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d70b52035b7ed2…

MALICIOUS

PDF

85.6 KB Created: 2021-09-02 23:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 768a68d10d28620cbbcaa4631bcf9ee3 SHA-1: 865b920619558cf6f051319819eb43c420978d66 SHA-256: 00d70b52035b7ed2406c874926b2d94f4a7e548caeaa497b86be0ac3dddb7f05
104 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised websites, including WordPress upload directories. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests an attempt to distribute malware or phish users. The document body is unreadable, but the heuristics and URLs point to a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aardbeienfeesten.nl/uploadimages/files/47632650132.pdf In PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/2642c0622e93c77cb9d53fc623f37df4/7149235664.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/morisajewawug.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/f80h23im34q06pnb92njijhibj/revubupenejufuxuk.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/93425434796.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/24749266817.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/54350208174.pdfIn PDF document text
    • https://etimes.mn/uploads/files/228482765.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1bb74569abf25dfbf6e22fc23fad8d83/20879560973.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/doxamomizujefi.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/da466bae3b707ed29352fcb1d9387a5f/73703052783.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/jotuvawigemem.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/41700837196.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/28707999796.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/14803223211.pdfIn PDF document text
    • http://labradory.pl/file/56626215031.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d135b65278---53051676685.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/fekonejuwinuxugudem.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074bd0c62bbf---ginaluzibujin.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/b61a1805200d4d786901631934b42575/31139000471.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632a99463a---83848634130.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/varejufozamazexuledizula.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbfc2b6ccf---63030687947.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/83594929074.pdfIn PDF document text
    • http://888chji.com/userfiles/files/80029737162.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/13268529187.pdfIn PDF document text
    • http://jkohut.pl/file/pimozaxodezupapes.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0a001c37234596801557cca7ed6c0ab3/jasozavusudegofuzem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=teaching+english+introducing+yourself+worksheetsPDF 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_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 11108 bytes
SHA-256: 0cee6457ada85c746fdabc4e5632150cc38cd3c943b20f4d117cc8ae40f89a89
font_02_sfnt_off000118be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BE 18232 bytes
SHA-256: 1aa8ee756e7f3f09688dddaa5f98c0b3f1cd8ee05ecb48412813ddcf3c06cdfc

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