Malicious PDF — malware analysis report

Static analysis result for SHA-256 197ab8039b2c2e78…

MALICIOUS

PDF

76.3 KB Created: 2021-08-01 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a15ef01587ef3578a42c10b97745ecfb SHA-1: d49a947664034e0998fbdeccb90dd41e9f3c719a SHA-256: 197ab8039b2c2e7862c08b3137c92f08899218bfc8fe9fad64c164f129269bf2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent. No scripts were extracted, but the structure indicates a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3885

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=ejemplos+de+divisiones+de+dos+cifras+exactas PDF link annotation
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ibh9l576fh5lb6jetvqdrghe2h/43022432299.pdfIn PDF document text
    • https://businesslife.com/content/file/tugenamepudip.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mfohcaf6bkpcudmccg87k1di2p/54739856046.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b006fe5ba60---larelu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c075dfedb39---47856661122.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/haobds9jcm77ojckf1eq6nu1hl/2748737738.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/74102151127.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96984ea0c---duwigojotakujegapi.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/78560124448.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3021082d58393ca83aec380b38c8b677/52941409824.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4a506182cdd39181295f2da6fb7ae9b9/88593555356.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609debfce4f47---furanofoboton.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c2ea357200838a346ab7ac3d0e4e2409/96477513129.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/foxitif.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/kibusow.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/siwilixarifupu.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-23/20210723220544397520.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/fixijusutiminezilebupu.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/4973926156.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/xelakatofanixid.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/nubawuverijuvedosugasix.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/wijivenedusujejavates.pdfIn PDF document text
    • https://digicpictures.com/downloads/viwezabetanin.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1vls8ccmsd0ark62hi5bi7dsr0/mamarowuzogenevunogojup.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/96385737873.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/hs1kcf8tj0e8ldrjk3fn63g538/89938129615.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 11064 bytes
SHA-256: af5957415ab01db49bc1b13478a2e87eb44e779a3388d5c98586086f4abe0ad4