Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92ad02f66ac0319…

MALICIOUS

PDF

70.2 KB Created: 2021-04-30 16:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a8c8922fb3a9b2bcc4384660bfcd7917 SHA-1: 6ccefec6a8d208e0f171d400b08e203bf24db1fb SHA-256: e92ad02f66ac0319b41144cfade1724d42953f7a1e5912f85534f3a4a62bab7a
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files or redirect users to phishing pages. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7312

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://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/a8160a23e0240093b81b90c1bcf5e705/84422881433.pdf In PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/9qj064kqqvdss764ci937flnk8/zerariralejobofoz.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/o74v8kq463plnjq88lj9ee4ka1/89989406130.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9077a132l1uohj9c7i29nja5u4/sapuwasuzetebakanidesejo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607887a004615---wimeri.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/54537270586.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/88389084885.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93c054912375eb13b9f792fd0b598b1b/zetukepemowuvidel.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e193ca19---wimefojugafolomaz.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/ead490a6fd66bf7d7cbe50d5fbbeb146/35467400206.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/104059db50d8aa415c53f187057428bc/ritanisusokonevodofuxeso.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3e426cc8---9048698894.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/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=adobe+reader+win+10PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/67f10bf50cd06d92533708b381f07fe2/nifazasovubesididupozirem.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010a7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10A7D 12952 bytes
SHA-256: 38f8e8265b4d562c4ac2f35dd437fb1d4671f932254b4b6695032b0927b09c6b
font_00_sfnt_off0000cc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC01 5024 bytes
SHA-256: b78332871afe36a31fd2a1a82ede0e3cb74e08ea2b22f5f383741242d9a11785
font_01_sfnt_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 14228 bytes
SHA-256: d3f9b59a84b38c623071881c7e7cb224c1feda738ff5de350ba21774955d97d2

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