Malicious PDF — malware analysis report

Static analysis result for SHA-256 080e43cfd082e539…

MALICIOUS

PDF

74.8 KB Created: 2021-10-07 20:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8701d9ca866754803b0dbd4b75b48bd3 SHA-1: 2dc61d67636adc116b4a49cc7f745bf8afcdc3eb SHA-256: 080e43cfd082e5391496854ea77a7af0ee1d932de67769ef879db5872dd01c16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, reinforcing the interpretation that its primary purpose is to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7517

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613c80a961ea1---gibub.pdf In PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/89342930694.pdfIn PDF document text
    • http://viettruss.com/upload/file/90160401970.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/57752376733.pdfIn PDF document text
    • http://synowka.pl/galeria/file/38264472431.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/4776968889.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/56283928782.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/o1fdebkkmuu4e862c36153esfg/57475414563.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/bubuguwug.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/pogoxojadure.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/59411198734.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/89035808730.pdfIn PDF document text
    • https://nexapos.com/upload/files/49948857243.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/wubelukirufisatez.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/menegifemusekare.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/21347517721.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/doxebema.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/k6rc7hjbrsbfhprpergecmvru3/18243512568.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/likusizolokurapisarifuju.pdfIn PDF document text
    • https://penzion-palice.cz/content/rafemukuberixolidoxumome.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/tulelinaworoji.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/fumupagofozired.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/19403015851.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/30231478800.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/kexora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+long+is+the+flight+from+los+angeles+to+hawaiiPDF link annotation
    • 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_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 10736 bytes
SHA-256: 3f6ddb7cdefd85a301e50644de47bcd768437198e04fd92bea7913bd27bd1def
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 19484 bytes
SHA-256: 5e7e8b8488d7a0a71c2c8baf9e9945ba6aa73ffe03c652e41c6da137c0cb6ebe