Malicious PDF — malware analysis report

Static analysis result for SHA-256 063fa816db0f2b75…

MALICIOUS

PDF

70.3 KB Created: 2021-09-21 09:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 91582abb7239ea08c97ed6a1f00a035c SHA-1: 2cb4dbc4b65d5d489c14392bbce2251d926b98dc SHA-256: 063fa816db0f2b75fc9dc6ee608a23c972be8737b4609c5f35369feab7711847
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7583

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://zvezda-rostov.ru/ckfinder/userfiles/files/mobebiromodurugol.pdf In PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/nisezupevum.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/18970908030.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/woxasi.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/seresoluwik.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/xewefazawilogaxed.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/49143508367.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/69905252836.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/65181715404.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/fedunufetebamowefudu.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/sugapikativawomavimemixa.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/wuvujaxivebuvowude.pdfIn PDF document text
    • http://pronobile.de/catalog/file/bopisam.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/70184698184.pdfIn PDF document text
    • https://trainova.com/userfiles/file/viboxonizemox.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/texolufu.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/27119743588.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/49048883808.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614382b8641c9---40439268340.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/99844005173.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/xafowize.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/jekufifixedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mod+pes+2020+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_off0000c36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB77 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 21248 bytes
SHA-256: e223a35313419be596b412d6fe3c469cff8c983922227b48c0732dba88d55dfa

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