Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9f0a5981a1c5e7…

MALICIOUS

PDF

61.1 KB Created: 2021-06-24 02:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 654cd1cf9ff14597778b1a1927154dc9 SHA-1: 099cc063276f6e1f2b2b3f87353f1c7c1f4f38eb SHA-256: 8b9f0a5981a1c5e7900d1c8e57cbde3e49993f68cdd49e3a8719f65ce65f1b6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage, suggesting it functions as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure disguised as an instruction manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8017

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 https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d99140b4514e4e7e7611c23fcb7f1a0e/65231422839.pdf In PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/12tgqfb3mvl9satn1gd7u2kes4/52861350444.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/99147378773.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ibdqcf8abvm6urann5ktgqp44r/45216795440.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bab4ec707c0---46587487551.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/01e9309b86030a3574ef668e54164b33/79657567072.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ov392gv9lbskq2qm15o0a4vdv4/15190467935.pdfIn PDF document text
    • http://saptpadi.com/files/file/kerupiwumejatozonirizir.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082df6410494---29234419572.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/jekiper.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/18cbfbe2823748db34b61246b7c7c109/jinoboxusosi.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030a644c70---36872741489.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/zasawoduwulajelivalibas.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a94ac4b4c3b---xubima.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/56516343041.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/4d22e03f8068f98d0e48f99484482170/1520516870.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17904923e---bosaseki.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6f327a55---kexijisododivakodufenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cannon+instruction+manualPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C3 4848 bytes
SHA-256: 2a18df48bdbd7f57758cec0c14bbccf3567c11f8664a71f8081229318c64a6e3

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