Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0352c20dfcbea3…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 03:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dad41d58075b6dff475dca837dadab25 SHA-1: d584441fe3ec964ec763b259e650acedf9c00967 SHA-256: 7c0352c20dfcbea325f91da5cf5f352fff44b350acaa60d0b90a691e4201bd9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8889

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
  • 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
  • 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://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b39f19b63---40811594128.pdf In PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1f190637852dec319d8e3761e1cbfb88/gojofu.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/60464035620.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/94253058247.pdfIn PDF document text
    • http://babamoleskine.com/files/file/81605223220.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/fd7a0c8382c507d4fc22ad9b9a3dbdf3/lutesubobonizagifik.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/80586929524.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/beduvepoduvaruf.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/muzifedumilavavojalusub.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/5fcd508e2ac76590d495858bf979d84d/11169871029.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/nomegipivudunujevaminil.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/porukoparinadifewilob.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/sozugabawikevogofiset.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/gusedofujolo.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210608104457938422.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/fakamivisepemelemov.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160957674b9c37---62878347435.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/38182095334.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e82a8b96cfb72711ffa58c6c7720a277/lovoguzexad.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/nosupusikisaxi.pdfIn PDF document text
    • http://sooclose.eu/upload/File/21618665882.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/62396677356.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/kuwegegemelagatexubova.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9b37e2e9b9159edae86136b62cacd581/37790008426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=%D8%AA%D8%AD%D9%85%D9%8A%D9%84+%D9%83%D8%AA%D8%A7%D8%A8+%D8%A7%D9%84%D8%B7%D8%A8%D8%AE+%D9%84%D8%A7%D9%85+%D9%88%D9%84%D9%8A%D8%AF+pdfPDF 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
stream_004_off0000d317.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD317 24632 bytes
SHA-256: cc2662d0750abe975ac89ed9593ae9fe5222b3a0ded7a7e0a601c2554b866b69
font_00_sfnt_off0000bf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF39 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
font_02_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 18792 bytes
SHA-256: e67351913691ca0be4b447b5837c244fd52eb25a05d8481352d49959de308cd3