Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f764abccb7d269…

MALICIOUS

PDF

88.4 KB Created: 2021-07-03 13:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1f62efda4222c52ce3ec4d0175817879 SHA-1: 429eda2f7a5b6961c031e2a8b49239d8f00d5ce1 SHA-256: 15f764abccb7d26999ec5c315df47ad9d1d9acc0706d3e2e95f622e12cd1a290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads, suggesting it's designed to lure users to malicious sites. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://smiletoursvietnam.com/ckfinder/userfiles/files/malatomigirako.pdf In PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/837a2b623dc552e8fb7994fee15ebd2d/sopazodimologozumazati.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/2362840705.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/desekonixalenakipirifof.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/02ef550a917fae949c7c20b289f1f6da/tukowukar.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070936e1a246---16909189804.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/xugofufomowokejexisotoxol.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/72126450603.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2e7736fae63014aa2de63ca66e2bb442/vefifulusiba.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2d14d6a340ecbd8cafc89bdc3e0fc328/suvarofenogafuvame.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fbacea283---kufolujilasasatet.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/vuwevowapomub.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b2b395efbcc7802285d032bd7e1dafca/78497864669.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0af442fdcccb6cdb2b6467085ee42dc0/vukatetuwumu.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/rajokefazif.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607193c592328---zajosonitodifutulisazipi.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/dominewozewevadokezamuwuf.pdfIn PDF document text
    • http://fittbike.hu/files/file/24162832292.pdfIn PDF document text
    • https://auto826.com/uploads/files/59527428147.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f858de8dc7---gerujuvemusakuga.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/59f2c4f7af105238be09020f3d985fc7/81484035344.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/93111345288.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/rh289pit6pc5a8mbokbdnv6fv4/xijezorakexozuvuv.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d37fc3e54def856dc8b610c5e5c65d8f/taxugigikatufasafibokeg.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7903d4d0d0---sejekanafokirenuborerupeg.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/56971554454.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9420e9e7e---4070595794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=infamous+ghost+of+tsushimaPDF 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_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 17100 bytes
SHA-256: 7daf20669d6d490f1de5e2eb1310ffb7c8dbe0eebbedc40170b614444e1065ce
font_01_sfnt_off000124a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB7 10436 bytes
SHA-256: 28504894dcdeede886bd358a16d22bdd5731b9f6047d908af65e7d1df3d7bcb5