Malicious PDF — malware analysis report

Static analysis result for SHA-256 6197ef79093d723b…

MALICIOUS

PDF

81.5 KB Created: 2021-09-23 11:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e581d621debb71ad90a6463454afb78f SHA-1: ec3f728a69299b01f8093b0ebc2e3f12a5410947 SHA-256: 6197ef79093d723b0fc5f43676d4c0e7a10e904c4c65565d70775ce2f99b4391
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into opening a password-protected archive, a common tactic for evading gateway security. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://westpakusa.com/phpsites/vertical_living/uploads/file/vamelofelogodojut.pdf In PDF document text
    • https://ritascreation.com/userfiles/file/sagadironutut.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tibuwu.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/35664011975.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/29799229860.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/vetanisobilajowavuvurex.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/24976981249.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/tarejup.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/masisoke.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/83058593336.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/54447792356.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/vuzududa.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/26599909319.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/ridelog.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/lasugafumu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/dikelafazewoluf.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/jonodeziwoweguwoxogajilu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/bc8adf1a887d9be24264aa4481a760b1/99251256795.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021091110241380554.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/jivuxekimut.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/97443139772.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/bagubetososuberof.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a0bd47a2d---teruninuvoxujagazava.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/69545780259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=zelda+sur+tablette+android+gratuitPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000d6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 18888 bytes
SHA-256: 8b6d3a52c2e1b0386caa4a7038387ee37cc37ddeebc15d32c55a8d5f55fd995c
font_01_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 10628 bytes
SHA-256: 38b8e3c6c7d61a28c354e8b9630a67433de2507fbcf697afb81dcdd531aeea89