Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98fdd9423ff7d8a…

MALICIOUS

PDF

73.5 KB Created: 2021-09-22 21:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: ab0f7869c99cc3c08850e9c02a6fde1d SHA-1: aa14a4c670df0dfc19b0abfc41cc66e02c8e81dd SHA-256: d98fdd9423ff7d8af180db6e2a2fedb1d993c485049e6d459cc182dcc4b3fe95
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.2283

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://queensparkview.com/image/upload/File/42671256454.pdf In PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/bepemosiwinipuwitaluv.pdfIn PDF document text
    • https://bdata.vn/upload/files/turupo.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/lfm55libtvoodtoaghhdgim641/30378652050.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/wamiterixise.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340f9f0b2f3---gokubabotu.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/pomimemeluziroje.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/9263566061.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/felofojariburijazuxufipe.pdfIn PDF document text
    • https://everestart.com/images/stories/file/35566660432.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/desepapilabakov.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd87eb8fe1---fejibalepibimodemeboxa.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210920_3FF044D3C5D44A01.pdfIn PDF document text
    • http://transdeliveris.lt/userfiles/file/kujowagegitisibuzezu.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/juzafuli.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132c4e4581a8---39569007362.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/zufap.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jabitilizesaba.pdfIn PDF document text
    • https://shibbirs.com/media/files/99056202560.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/benosabelubotu.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/71057781692.pdfIn PDF document text
    • https://songhong.info/userfiles/file/3486513785.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614168a6ca9d9---jirepovuvozibozi.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/63546144284.pdfIn PDF document text
    • http://paliukenas.lt/i/File/dutorapubib.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/torevanimolemusig.pdfIn PDF document text
    • https://harom.ro/files/file/femekoduvup.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/finofozajifirosevagan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=4k+movies+apkPDF 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_off0000ca10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA10 10204 bytes
SHA-256: 60868f9fcdc7d4f5e95249fb13a510fe9006ac99108862c5e2a8250470864459
font_01_sfnt_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 18452 bytes
SHA-256: b8048b6f51e01132d987cd32db5f19e4c1b7d05171d3842c513d9a5ea77c350b
font_02_sfnt_off00011162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1