Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c08d00bd8003a48…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 07:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c36677b31928001909c5f0965aa5289b SHA-1: af34b4420ecb13004332ff7e38feb0ff88922a06 SHA-256: 8c08d00bd8003a485979ba0465a5d3e4136253abb3a12e28c54c5548504f973e
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The ClamAV detection and heuristic firings indicate this PDF is likely used for phishing or distributing further malware. The document body is heavily obfuscated and does not provide clear textual content, but the presence of multiple external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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 http://mitcostruttori.it/userfiles/files/79888763057.pdf In PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/42241382076.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/95284084048.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/69203372513.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/fatoziza.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410dd425084---43277254772.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/fifid.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/49901607274.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/19743435780.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a71bc8b6f8fff5ce0db99af1eb255765/metupinorepemof.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/luwamukoxaz.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/10546730788.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/84769037521.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/14736144011.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/35036756361.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/garovu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79aeda587---rivosukakojigapo.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/dawugetofubodesejeli.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432505ad979---xisos.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/81393210510.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jepegak.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/37275018522.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/33402021777.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/87988301394.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=captain+america+civil+war+full+movie+in+tamilPDF 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_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 10756 bytes
SHA-256: 8a8f6e03028e956bd91cb1cd76c33c8eeb180d4d5371fed277a7c24e30ab4507
font_01_sfnt_off000110ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 18136 bytes
SHA-256: a70f2505b8fb3198ac2be5d598c8894f3c73f3829048631430b6536c5f360acc