Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ca480841f05adf…

MALICIOUS

PDF

77.8 KB Created: 2021-09-21 19:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 69f1e63098bc39562826245a8659ae4e SHA-1: dd4022dc7af70dbde9e4591cec7fcfb80a0fddb9 SHA-256: a2ca480841f05adf6215a1af65afc88a787209e22f73ca64baa0b2da779af8b4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5544

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 https://ratoempat.com/contents/files/12687957437.pdf In PDF document text
    • http://www.terresdescaraibes.fr/file/sapaz.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/41614949730.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/93683471861.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/84645935171.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109011020139034.pdfIn PDF document text
    • http://greenbrier101.com/userimages/muvufifuzogifulelisutija.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/92598976628.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/69127379543.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/6510721173.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109132301574049.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/zogenajanozu.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/dibejibuvod.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/96680989484.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/99539984949.pdfIn PDF document text
    • http://altus.pl/userfiles/file/zuxaxovipefosidivilokox.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b5598765d53bad1d04ee9fd12cf390d9/73467364964.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/93944909572.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/lokurigem.pdfIn PDF document text
    • https://ipkameros.lt/userfiles/file/xeraninutelujewavuw.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133e89bd4e66---kaletapo.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/feraposunomuxi.pdfIn PDF document text
    • http://techbis.pl/files/file/zolugut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=instaup+ios+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_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 10112 bytes
SHA-256: dbb0de6ae50c3199d558a6f6766998fd1fe2a183b94114685360c0153406965a
font_02_sfnt_off00010d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D85 17352 bytes
SHA-256: f51e47c5f3b358256b102b541b27ba05a63b205f6927c64dbcf937ac7875943c

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