Malicious PDF — malware analysis report

Static analysis result for SHA-256 32eb447c9b48dd7c…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 21:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e07b5300355b39c4c02681c7d756eee0 SHA-1: f8a93d113d77571f9f64073dd98ffb0d3340cbc3 SHA-256: 32eb447c9b48dd7c03f8b4a42ed8ea0746a3ed90aaa90a771f9398677b37eb8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

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 https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed009330c2---fosorawulupifafakapufomop.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f7d9527b8---21794952727.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/573f3824dca72302db1cb842c7e49811/jaresomuwidara.pdf
    • http://rymwid-training.com/userfiles/file/60036551327.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c574e254f71---kigivonewolararuguwip.pdf
    • http://abpaluso.com/upload/file/3894041639.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b048d7d14ec---xasum.pdf
    • http://yilip.net/userData/board/file/27175052787.pdf
    • https://bodegoncriollo.com/userfiles/file/76430703740.pdf
    • http://www.gonouvellezelande.com/files/vaxiguzu.pdf
    • http://uralinteh.com/uploads/files/62457851878.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/391e91d91e023418dc0c5f2a95f59672/67231930199.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f2d2d691c9096e6d64fef5f8a677d7e9/21558562652.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160be6d2a78a6a---40654952192.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2e849c8b60c45e6dcd3fa7cd45519ea6/kimefisalaf.pdf
    • http://chinazzjx.com/d/files/18475534340.pdf
    • https://tskrea.com/userfiles/file/xekaf.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b00328e3c3b---7624367271.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/54e3df2106534e96c000e6eab517a6c5/77608513622.pdf
    • http://maychamsocda.vn/images/userfiles/file/vuletesezulelonebijofiwa.pdf
    • http://polimak.pl/userfiles/file/bobizavawizi.pdf
    • https://roomart.uz/ckfinder/userfiles/files/22867247744.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/b2fca6a2a21efbe5799404e581b8a333/93140889138.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fe579dc08---84995089720.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf8300044---79318315599.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=identification+of+microbes+pdf
    • 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_off0000ff04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 16792 bytes
font_01_sfnt_off00011716.bin
f87870e62cf6169bf29eb9b30c82b6396855faab05e0fb4f6673887252a688a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 17848 bytes
font_02_sfnt_off000144bf.bin
f9c4ea414131272de72eca5739f1ccf04eae1e6878cf0c21ea49dceaf9ebc776
pdf-font-stream PDF embedded font (sfnt) at offset 0x144BF 10824 bytes