Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34520a472ecf15a…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 08:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db13aa33e9c9d9edb8ad0122227c8e64 SHA-1: fdb3a855cde9a9b87bda8029c7bbfca25b63bd34 SHA-256: e34520a472ecf15a7a76029a8abff215dabbe4f0f02c63a9afae49ae362dd4a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laborke.ru/uplcv?utm_term=research+methodology+and+ipr+mcq
    • http://bindashnews.com/userfiles/file/tejoxovidimoro.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6ba74e4f---65260617916.pdf
    • https://myphi.biz/nbloom/fckuploads/file/wusizepufutan.pdf
    • https://lawina-radom.pl/files/file/6052426022.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072b087136e1---tenabimewulis.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/13863436866.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf36d8e7e---81579541682.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/405558f747225a425da79faafe55d3b1/guvatemenup.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/c5d3499003a0aa9cb0fb097201d5dbdd/xekadudapepisi.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098647330d85---21025700233.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/83061678638.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160747e4053bbd---dupade.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad7ff67a82---konaseripuzepogawew.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac03c0d2605---75321784456.pdf
    • http://ahxxzx.com/userfiles/202105/file/29092416778.pdf
    • http://musicpark-live.de/userfiles/file/28648443689.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608154be0d24f---75785352943.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f3e27935---sevuwobexet.pdf
    • http://imcborivali.org/userfiles/file/24185490935.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a93d83aac1---xexafaveje.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607292ea1fc45---8578939457.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8b0b86f42---54261560783.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f4f967ea4bdb2049dac882a2918961ae/togegeparedegunojor.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/30884fa24241f60657a1cc341ae954c8/nixojumezutunofom.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_off0000d14a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD14A 16792 bytes
font_01_sfnt_off0000e961.bin
2bef69e89b474e443aff835757cca8d1555e080375e99283276c4048fe331fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 11268 bytes
font_02_sfnt_off00010326.bin
a6525a80857ea528c65b1d2dea0de25ff1ff2fa8b5fce76196e903416781628d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 17564 bytes