Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aedfd111a0d9b4…

MALICIOUS

PDF

83.9 KB Created: 2021-09-22 14:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc9b54f3b3f76d47a60a7d5a73815eb4 SHA-1: 3a65b5644e3a63339abc4be9141a9835b6d6475c SHA-256: e7aedfd111a0d9b4206f5f8aacec6f700372f82bb94791e4667a238fde124a22
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous distinct hosts and links. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to obscure malicious destinations. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1247

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
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cimkezes.hu/uploads/ckfinder/userfiles/files/vepanogoxudotogudovazo.pdf In PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/70104103430.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/75996800752.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/86305329874.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/bugikabibo.pdfIn PDF document text
    • https://fultoys.com/userfiles/romivitafigatesofa.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/79984839129.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/72278869458.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/foxobanovukozagepof.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/23550165205.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/79858248160.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/ripox.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/zedapigamodifelotaxox.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/78947289196.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109221717302072.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614342c2d5e40---baxenokob.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/dezejug.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/12110056911.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/xakutenojokexuziv.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/12281419159.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/57073045063.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/somurinajivelebefaze.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142325f764db---gafokuder.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-6/20210906172805588842.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/mivefid.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/mapugovapadefuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=123+movies+2021PDF 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_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10196 bytes
SHA-256: bbae2626faec5ab53c94f1674641be12a707ea780e84fb2866751a5b89fe6b32
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 18916 bytes
SHA-256: 256eaee3e5a4f1d44df7782909976b2cf896aa06224009f5fbc0374a81f61b27
font_02_sfnt_off00013425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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