Malicious PDF — malware analysis report

Static analysis result for SHA-256 2223aba17d3e903c…

MALICIOUS

PDF

76.2 KB Created: 2021-09-18 02:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e5da9c05324999401313a7f574a9ec5 SHA-1: 25917cbb79047394a6919fba98b642c680c3bfe0 SHA-256: 2223aba17d3e903c782188ef2491c3ec3fb31d1bf28413df570521f09fbfd7c7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5732

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://marcus-1.com/FileData/ckfinder/files/20210907_1C9597D27617F7E0.pdf In PDF document text
    • https://widerbet.pl/userfiles/file/depinabudopikuvuporewepob.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/revokoparuragupugodutu.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/vukefedemumevu.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/galafebi.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/11854952890.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/2683628263.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613109618783d---66040829040.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/97176610458.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/neligajene.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/zogilulalamasid.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/zebozuvin.pdfIn PDF document text
    • http://holland-ex.com/images/blog/file/52583443896.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/27539143319.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/33890595220.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/96021323595.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210905_060511_6903.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/zumigisorig.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/vexajofobofesiwazilajeli.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18601877557.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/45142056624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=padmavati+full+movie+teluguPDF 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_off0000ddac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 18324 bytes
SHA-256: c6182c292bf238b8e3b0175525a56d499d822222e850cc60fe4b63614229e0b8
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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