Malicious PDF — malware analysis report

Static analysis result for SHA-256 7224e4e8f9686d75…

MALICIOUS

PDF

79.7 KB Created: 2021-09-01 04:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bd430740f2484366c7cf55a467dc386f SHA-1: df658b94309a19350a69ee3044173032ca7652a2 SHA-256: 7224e4e8f9686d7537f04d12929d2e263dd30449fb225122210c44ec021ea59e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, characteristic of a link farm used to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure and URL patterns suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5826

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://sciattella.net/images/file/88438747447.pdf In PDF document text
    • http://sarljarry.fr/userfiles/file/jebetokarapuwutilejifovi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788156af2ca---nubafaba.pdfIn PDF document text
    • http://torgoborud.org/images/file/vazubik.pdfIn PDF document text
    • http://jsdarvin.com/files/64568474373.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/902f87535dc18490481596fa52d14028/11385337067.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f284ffa0e070dcdfe6fb5d16b5388eac/sowaloradumo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807d16890b9---53224472972.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/bd1fc39fe7b2269ad40df879b2b1697b/tabetojifaxefeka.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/f8d9f54ee3305b37504486f76ef18e3f/16858097516.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a78fc013b---65705143246.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/najewemonaze.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160724a3d7738d---75226917870.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9549f948803578a51e7e9aeb13347a9d/69649260071.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051303103873499.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/kogotapewirojagixobor.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ba3ed528d---luvanijevagoditonet.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab29d3126---vepinad.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cb67a90ff0---57270491509.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/pevoroguxuzix.pdfIn PDF document text
    • http://vodnik48.ru/content/file/lafefifame.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/josexosinenudamexe.pdfIn PDF document text
    • http://valeneighbors.com/userimages/vatedisutusofu.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddc112395f---vowemowerejesugosudoj.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/lifelilulasoluxuwepeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=paper+material+substance+painterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 18756 bytes
SHA-256: a1ea3aaa391663024a17dd326bb89d68d70c126fc0e99b9358cd64549503bcf0
font_01_sfnt_off0001128e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128E 10656 bytes
SHA-256: 5e81f5054760cd03fef7e8a2dec7bf5445e7fd489ac7d2747c7b78b3ebcd24a3
font_02_sfnt_off00012aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1