Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ecfb688efe5c78…

MALICIOUS

PDF

71.7 KB Created: 2021-09-12 09:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c64dc9e7b6ff128d076a09d129401202 SHA-1: 5182bf38bb273ab780de2747531565f485466032 SHA-256: e9ecfb688efe5c78218eef6903d2d1f3fac354bc00b9d50d3e6b7df7fb9e6793
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, possibly exploiting PDF vulnerabilities or serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=phone+hacker+2016+apps PDF link annotation
    • http://ferrocom-spb.ru/userfiles/files/mopubelowowulemokufat.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6c6f5f758---rowozejarojojovugok.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/87236285630.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/jevadulibexowubasoxojope.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/wululilivoju.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/9121039547.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/dujomudezuzokujuradogo.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/jigubisa.pdfIn PDF document text
    • http://rurisnet.org/images/file/46754745307.pdfIn PDF document text
    • http://splogservice.ru/content/files/botifugemowejezukix.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210912083434.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/xuxoberubapol.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/jinubanuvurasibipesu.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/39145974971.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1cd741e14---39432270155.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16134a91b2d84c---vomepumotalepufupixap.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/87960593916.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109031621129964.pdfIn PDF document text
    • http://annabarons.com/files/files/94022887696.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/70729304051.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/67141817219.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/rinunelononalaba.pdfIn PDF document text
    • https://renault-service.com/userfiles/49214462642.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/24053703019.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_off0000d635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD635 10788 bytes
SHA-256: 8f93baf022cfdaa0dcd5831268049168dc9a683d5176108e647f26cc9d0a3ffc
font_01_sfnt_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 17220 bytes
SHA-256: 192ea057c50ab75ef3707436e954b7b034cbe25dc34fe012776f79b1c3501a89

Open this report in the interactive analyzer, or submit your own file for analysis.