Malicious PDF — malware analysis report

Static analysis result for SHA-256 68156a2bfcd7da0b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 11:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ea3d1f4c3fafce363cbf4e1e54ba164c SHA-1: c1a4b08dff8e397300a0ab045764821fc51c64f0 SHA-256: 68156a2bfcd7da0b7be0c9d1ad14508b9b97e62e7e2713f8117f4d99d6ef04a1
124 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that point to a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

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://gmicropilotes.com/uploads/files/gisajenobesaxadadatiweleb.pdf In PDF document text
    • https://bustotoronto.com/userfiles/file/gojinotuzomewixewelira.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/64622665720.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/65237788167.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/9199152646.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/sefobusoriz.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/59293121578.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/duberaluzutamilesizefo.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/jevodubuxomefus.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161407fee62052---26749562158.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/xukajewifu.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/parabejugutusogedipagusib.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/8213246984.pdfIn PDF document text
    • http://strap.sk/uploads/file/52115764258.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614299994230f---62358163796.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/45808042299.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/50907764731.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/duronigibaruf.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/karubotixibe.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/lamopuluxera.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/98956172709.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/kiberevanumogutam.pdfIn PDF document text
    • http://eko-uklid.com/files/file/97587625647.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/golutuvinuvu.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/49519809298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=square+cash+app+apk+latest+versionPDF 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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 10948 bytes
SHA-256: 8a5127959b3579013e7b191a5f43ed4862fa908520cf35602bd61d23f1075ab1
font_01_sfnt_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 18244 bytes
SHA-256: efb7b57322d52f36b7bb5080c147ae2891b61a85abcae6c27b63896d03eb503d

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