Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c2397b600f784a…

MALICIOUS

PDF

70.7 KB Created: 2021-06-24 21:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aca4379e8f649dbce3dd2c82fe8792c6 SHA-1: 3d5af8302443f7e25433ed60ba60c9965aff948f SHA-256: b0c2397b600f784ada174f5a0b3681299ce4bbb3f6ae15db34c7032c09f72737
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9679

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
  • 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://catamma.ru/uplcv?utm_term=deficiencia+de+vitamina+a+pdf PDF link annotation
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a459c69eb7---79896362833.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/20634297797.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/k78ss30uujfiel0chn18t8c752/zizanegobaseluruto.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095f8e147739---61301467647.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/11175441456.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/42140661588.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/44272956023.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/srl72n76pf19lskfql0olfnj75/14607837425.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/12050055390.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abd5df2580f---bakidajinowasepakowewes.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/noluwopem.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/5mui0hfg42keldfdbn3grqo1j2/837419176.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d239c7bb039---66234473406.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38c08ef7b4---7258612152.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/22900721523.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/lotesazibewikedupexibugap.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085279d7b87a---banude.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/35387642848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CD 5052 bytes
SHA-256: ea8f24bc8fec2ed5ee31552e1dcd4ae3410b7aa554f3cb29cdf6915d9d2a55b3
font_01_sfnt_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 13088 bytes
SHA-256: 1f6f7619d39e4e99d6c23212e52054dea4b3bbfdad1059f10b02595284de48c8

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