Malicious PDF — malware analysis report

Static analysis result for SHA-256 067b4dd34e955bd5…

MALICIOUS

PDF

89.1 KB Created: 2021-06-28 09:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5807fbe23193cc243c3ec0764d9fb4b5 SHA-1: a11140318f5d4cd74af5872113eba62ca9508e3a SHA-256: 067b4dd34e955bd526031dfdd69e8c264026328d26b66317388b43114ed90610
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple links to potentially malicious content suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/uhvn0r2kud0lnjn4s3g5rj45vc/52782874700.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae3c7efd62---kuvolajavovijumoroxo.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941ecd3e58e---16450895918.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c929fc09e16---tabafumexizufosufagewep.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f55731d6e8---gabujuguvuvezewavivamewat.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f3f535246f---61384255599.pdf
    • https://implant-drill.com/userfiles/file/xosatunozubin.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b671d268078---zuvumelobarekekorik.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/0124ef670b82dc13920811580abf1ffd/xetirofibojesij.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/iidn802fa3ptesme4it9lsdgmq/21320225485.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815690e5531---17848942163.pdf
    • http://sicilyontable.it/userfiles/files/38199177817.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/mgegof8vhoe7054816ih4ndi04/vikekeb.pdf
    • http://altelaw.com/uploads/image/file/76735357091.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/c0e5ce46770d5181a85c89ad61cf504f/90784702088.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b831409681---sumefinusirixenanogawige.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84a18be40---nozam.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/74b434563406decf9d2b29dcb0ea041d/tedorinudasetojav.pdf
    • https://caribemed.com/userfiles/file/42624791908.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f23b693efb44b9669baebe8abdaca406/tatezifoperu.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c834f34426---21544432018.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/09quuj23be3arr4enqp94iibnc/35273637479.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1e32449aa---bugujebunekox.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fc43e936a---pimalafatuvopimiki.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=equity+design+thinking
    • 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_off0000f950.bin
aeb1067c7106acb196fd3d4a23449d91a7b172a3b53b6315d05be43f3f88a752
pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 17816 bytes
font_01_sfnt_off000127cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 16792 bytes
font_02_sfnt_off00013fe4.bin
c5af2d8cd87b712fe942f9dc15e62bdbe3601a3aa7d2f4ee92dc8184cdfa5443
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE4 10532 bytes