Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91001dfe2b67cad…

MALICIOUS

PDF

76.3 KB Created: 2021-09-21 07:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba4a8dad3773a9a25b4b9eda8471c7ce SHA-1: 38204ebda0fdfe2274eff84f34653c1925324682 SHA-256: e91001dfe2b67cad2d80a2b63df7cd3fb35fef3a6be23aa00f39e6e5091f2be1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bonezi.morefriendship.com/upload/files/56361098175.pdf In PDF document text
    • http://nepalbestcargo.com/userfiles/file/sewanuvilalorikoze.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161411246b5069---kitedif.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/86374442621.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/lamazevotil.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/45467262826.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614741d929d37---29170691533.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/63206119794.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210902055939_b87wio.pdfIn PDF document text
    • http://carbonelite.ru/file/zuravexovopeputupus.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442b68b0bde---kovugonurivuwafogusipaw.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/55780246742.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614959322303a---vufotibujobesujabaf.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/57475207981.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/tte8u4cgdh8e9m332ni907v4gq/50573231626.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/lerokadosemorebemuxaxaxo.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/11998716882.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138888e99bab---70540102535.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/39609188937.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/80943202720.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/22014194630.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/fakokabeti.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/3595504798.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/48197444365.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/duvonuleferutepomokima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=multiple+keyword+position+checkerPDF link annotation
    • https://mediaget.com/userfiles/files/zemuwudulifimavipu.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_off0000c71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 10832 bytes
SHA-256: ed579affbcc3f546b104caff97653bcb4b260f8c1b91d9a7b354dfc64bcffca0
font_02_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 16828 bytes
SHA-256: 9af8d16f0d5ef16e5ff263e3cf94f9017a02ebfe48c82830ba19e636cbe1f11c

Open this report in the interactive analyzer, or submit your own file for analysis.