Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d7467c345bbe2d…

MALICIOUS

PDF

358.9 KB Created: 2021-10-11 07:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 29beb9c7dd51e3d273dddaa6a272db5e SHA-1: 4e87c84ffbefba6f1ed0c15564b365e2ef1ed6a5 SHA-256: 76d7467c345bbe2d8b989247557388c6b114b91460407dfe23804dfe481d76d2
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI and the 'Urgency Lure' heuristic suggest a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9107

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://nomylo.ru/uplcv?utm_term=jimmy+connors+2020 PDF link annotation
    • http://yjbiotech.cn/upload/files/nimukitodutuvum.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/ralive.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613221b5437f7---fozegajobezomizirofom.pdfIn PDF document text
    • http://saint-party.com/media/file/zoruzuseli.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/jizepimetabumeronukosike.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/93606392134.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/morudimisebutejupo.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/56927031070.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/94407322560.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-10/6217215c0532272eba273fa4ef9ab0a4.pdfIn PDF document text
    • https://naves.cz/res/file/5806434398.pdfIn PDF document text
    • http://tzsunup.com/upload/tijuvezugimil.pdfIn PDF document text
    • http://rs-entp.com/upload/file/63767767619.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/79549432799.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/12625629542.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/52132577073.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/mamakegilisuguwotano.pdfIn PDF document text
    • https://airxps.com/userfiles/files/xizewivijil.pdfIn PDF document text
    • http://epmachine.ru/d/files/69480307066.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368051c8bec---fimiwovopuvolose.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/4517072013.pdfIn PDF document text
    • https://qcbusa.barettis.com/userfiles/file/15750888010.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202110062146173809.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/22086111531.pdfIn PDF document text
    • 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_off00052254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52254 22468 bytes
SHA-256: 5254aaf231ebdd678562314bd7a4cc5df2f905fc6295ef34e63eb113eb5c4496
font_01_sfnt_off00055c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C7D 10300 bytes
SHA-256: 659d4b40b3964c7daed59fee4f1fb19d0d5fe1441754ab2d519b4077abb72f7e
font_02_sfnt_off000573b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x573B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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