Malicious PDF — malware analysis report

Static analysis result for SHA-256 8075579ff7a28877…

MALICIOUS

PDF

73.5 KB Created: 2021-09-17 06:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d69abeb58f0e9a46046410132f0401cf SHA-1: 989f31ceefb5a01f8255061726b73d5695f20fac SHA-256: 8075579ff7a28877d7c8692936dcbf95b17dc714b06a091a949c875e1e9c266c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV, indicating it's likely a phishing or malware distribution attempt. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external links, including one pointing to a raw IP address, further supports its role as a lure or downloader.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://majubesar.com/contents/files/zowimafilagebopepaluzed.pdf In PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/fapodubaduxoriton.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/54262799398.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/71096265693.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/xiruwuminufusoje.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/70168958166.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/noforunetivovora.pdfIn PDF document text
    • http://china-miyaco.com/img/file/20219414230.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/wuwesujima.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/41469051432.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/jofesugidepivuwogusir.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/67530673613.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/83989461137.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/jukisa.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/2356040491.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/rejukawaxuna.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/sijiwikededepepesup.pdfIn PDF document text
    • https://inarsindbari.org/uploads/wobenat.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/98136088614.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/favabozuroligopitu.pdfIn PDF document text
    • https://izr.fr/files/lewinamamubaxemut.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132616fd6581---litufupiwozeferakapured.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/fapivasadivitosapitetepin.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=android+tv+alternative+launcherPDF 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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 18652 bytes
SHA-256: 4ca16cb1c91be64c8c86d041ccf4efd7a9b3e9304a9cc3992b1ea787ebf5c5b9
font_01_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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