Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04bcd084c1594a9…

MALICIOUS

PDF

64.0 KB Created: 2021-08-08 18:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62fbac375ca65e8e743dabff8c73bad9 SHA-1: 4fa22687b027551a28a534cf81fdee11cc20f84b SHA-256: e04bcd084c1594a97d717ea73553067374f37cc31118a0ab2a94aab57de759d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The primary attack pattern involves directing users to potentially malicious or compromised websites through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9193

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wooshin.kr/uploaded/file/140694899360b2f81ac3823.pdf
    • http://z-i-f.ru/userfiles/file/77361756347.pdf
    • http://interface-referencement.com/userfiles/file/5941965595.pdf
    • http://preciz.com/uploads/wysiwyg/files/guzinerofikedemuboti.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/8e1f2ee942d4a5d269b63b2d4ca63aa3/33768180303.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/6a8d9f9092cfce0111a6adbbf4540574/24258190115.pdf
    • http://veraschwemmle.de/fckdata/file/zazagit.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/0bde0084bd56389eb864514492d7ec22/xivevigofopekag.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6472737706---799774283.pdf
    • http://przedszkolenisko.pl/userfiles/file/98809696100.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/2p3o91b5vhnabm46rpe5cotngh/zajazita.pdf
    • http://ggmtc.net/userfiles/files/rakob.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c926ea68f8---zatupisiza.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wovesuziliziba.pdf
    • https://zohopin.com/calisma2/files/uploads/38448688151.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160839edc0c4f4---19386137825.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1fb081c8d---pomepovom.pdf
    • https://nazragame.com/calisma2/files/uploads/siduduwezediroburoj.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/91390914492.pdf
    • https://stbenedikt.ch/userfiles/files/tarazemanetarurij.pdf
    • http://bijverhoeven.nl/uploads/files/38413902105.pdf
    • http://keacg.com/upload/files/18896187115.pdf
    • http://aktifithalat.com/resimlerfiles/pufikodururu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=exercices+adjectifs+qualificatifs+%C3%A9pith%C3%A8te+attribut+cm1
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/sofofokapizenalovu.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 16792 bytes

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