Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae7eec4f521fd1e…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 16:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e8d0ecb27a841b528f3a88fae71515fa SHA-1: 5e549216fff3b76e7b206dfbf383db22508f183c SHA-256: eae7eec4f521fd1e3caafb2a5760def99f262c6ee74ab2c2313e86a21a04522d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits multiple heuristic firings related to PDF link farms and compromised CMS uploads. The embedded URLs, such as http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/34946977890.pdf, suggest an attempt to redirect users to malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's primary function is to facilitate access to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier clean score 0.1240

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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 https://philabc.ru/uplcv?utm_term=checkm8+free+download PDF link annotation
    • https://daiichigroup.net/uploads/news_file/69228324184.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/55058640356.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c27b4cecc8---17036640603.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609400fe36386---zaluzuwitefav.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609782f27defc---89207480172.pdfIn PDF document text
    • http://juentai.com/userfiles/files/13157809489.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/28620747737.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b81899cc---janowunoxixenet.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a16b8ea98---fowax.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/34946977890.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7q0nnhkc7fct7g6a0kro98n3fr/seralobazu.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2198c4359011c4eadccbf34b86a975e1/93245608713.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/licingr6vhmltbm97cilm5ui15/15517498172.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/vonamu.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607daade25a3c---dorijalidelas.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/577b1b90216b59f21cc5c971dda3d69e/58280952611.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b468c62af1---vewev.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071816339949---torodafugekunitebitab.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/11537240643.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36959a3194e446229cc11854e8c18d3a/38310827290.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16080d18770cd8---95722974259.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a181db9bb9d---negakexujopozami.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/foduwivokoguzod.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/gp006hhc0p3udr9v0l3lvvpos6/63462655998.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/24499786866.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/wimisubudezabutu.pdfIn 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_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 17068 bytes
SHA-256: 22e20d6d694b9f59d7b8a623cd8f08f2b6bc8d925d16a3d930a30e3f9e8234e1
font_02_sfnt_off00013b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 10800 bytes
SHA-256: 902882f9ce019f1b99062bd41cb7068b12b962b4eb26172ab249c1eabced04fe

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