Malicious PDF — malware analysis report

Static analysis result for SHA-256 e856ae9af20e0f7f…

MALICIOUS

PDF

72.0 KB Created: 2021-08-18 08:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d7ca4609bad6868d02a7f1bcadbaf3fa SHA-1: 3652fcf655e2f12e92a6a1f94786d0ee486f219c SHA-256: e856ae9af20e0f7f2543f1c9ad431ed7231f15b8c09a1c1d00b2b90c99ffca5f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, pointing to multiple potentially compromised domains, including WordPress upload directories. ClamAV detection and ML classification further support its malicious nature, indicating it likely serves as a lure or initial stage for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9504

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://usarsenal.it/userfiles/files/26413670652.pdf In PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075346b7a854---pevapudijodiwojobefipaja.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/pogusajixirogos.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/bazizivekibarisiwe.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/43de6b7595537ba636b1967c9eb93120/72078873014.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088bb086f9f1---21669044665.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/5073376776.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/vowajevabun.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/gezuwipikeko.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160832be067cec---zinititikavadorafi.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/59841986299.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/votom.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/vutiwepawiwop.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name//files/55681306870.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb3298f69---2564148552.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/87868780911.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/30969493747.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/rinidefukijilirib.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/69635476636.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/kakefalejidusikitipep.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/40300284684.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072dfa227a08---bevuku.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/kexaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=raya+and+the+last+dragon+showtimesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 18492 bytes
SHA-256: dee5b9610510c1d852e4a83a230936e6fe26fc7662b9f10d81811465234deb56

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