Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0dad4c8b03a8b4…

MALICIOUS

PDF

94.9 KB Created: 2021-07-02 16:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2e0f4b1c8338e9924dc03d950fcbe10 SHA-1: f741f50156659dec43380e6fe579b7dff83bb391 SHA-256: 2d0dad4c8b03a8b40351cbb722e3b4a02ee56c58bbba1db1cdf14622d2cd2a3c
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs hosted on compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c0f6e1b01---nuvikuwarituxexumudixereb.pdf
    • http://ackerviewguesthouse.com/userfiles/file/97411780045.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/28f87sb0v0489l7e35v5f350kt/pekaraperasadok.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/32485044837.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/62259056085.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077c28353c89---wiwoludabedar.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9ce1184f39a23842f51e92dec1afb0d2/91055748414.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eff1336f3d---70303892982.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713d6379fc8---sorezoj.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607883fb14a72---fexujalep.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/84eac22390148888dda762cf0b3da807/52669871645.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a228733e359---joxewewuwepixibadez.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8505f90d---17862843209.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5cd14f80---fafajenu.pdf
    • http://wjvanderheidedienstverlening.nl/uploads/file/lasew.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/61cb2fbb9c15180a5eb88b504d8d64cb/67002070814.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb9ff3196---77985028726.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ef055f8d9---zatagutewufe.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/2pf7cuv5evlg09absd6e6v5iv2/sizox.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe0919de5---7281981888.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a0389714c486ad8a4a3ef21c21f45218/65578471571.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/949b51fd1b294ae9c1d9ed0fd87e2b94/naguzibuse.pdf
    • https://liantoong.com/archive/upload/files/vuzag.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c242d4fa7---rizunojipaxewum.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/272e1de3a5ab5adacf08ee3e8e667e1c/vadiwugagomagipojeminoxin.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=meaning+of+the+word+adjunct
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110bc.bin
298bf29ecb3fa4cc089dde7959f4024d4a418d61851bfdd1c8ca78d51024ffe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x110BC 10852 bytes
font_01_sfnt_off0001298a.bin
da6d52c718aebfa1a57f1382c0bcdddf78af212a6604c25c47758b924e943f64
pdf-font-stream PDF embedded font (sfnt) at offset 0x1298A 17300 bytes
font_02_sfnt_off00015678.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15678 16792 bytes