Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e02ca27abe3b602…

MALICIOUS

PDF

84.4 KB Created: 2021-09-21 07:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3bcd06f517500102d7c1a088326007d0 SHA-1: 1768da88ebaf2ff842e826eb93ccafe9cf01e309 SHA-256: 6e02ca27abe3b6026e748b18831b39f736426c0af3a482d974bcf36ae07f5010
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://nomylo.ru/uplcv?utm_term=the+lottery+shirley+jackson+questions+and+answers+pdf PDF link annotation
    • http://krasneclanky.cz/uploads/mogamoxenaxi.pdfIn PDF document text
    • http://futboltotal.net/images/files/bejuwu.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/l80144deia5uehg3qeb8omueo1/fofijisusufawanuriw.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/67676713347.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/8096102557.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/48514591643.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/46797051857.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/85717886447.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/bovuk.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/zivivadopufaj.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/79485009088.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/88667560383.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/rujinafomenufuwivajelazo.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/87871088840.pdfIn PDF document text
    • http://asja.ua/userfiles/file/muvomip.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134aea4d9a7c---8108335403.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/paxenita.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/11290945333.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/ec34e7c6244f7a866e7ffeac8c7ea358/95514128993.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/3853705786.pdfIn PDF document text
    • http://3q1p.com/upload/file/210912213846586002jkwzj6jfovtb.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 17872 bytes
SHA-256: 15ba0e47ef7ca5b5753a5458a6c265da8ab7ee4923806ad72322721947e3863d
font_02_sfnt_off00012928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12928 11348 bytes
SHA-256: 2b97c963fa41ea476e15b37a8df9b05e4e0ac34d8d713ef5e1d521108e7654a5