Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e6d3a30a9c38bb…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 05:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 002b561cc043ce44740ef4f7d1faec2d SHA-1: 3c32d12930ddea4efb47797b8a31c06201948044 SHA-256: f4e6d3a30a9c38bb88493ae291cc24ccf67a969c7e535fbcea4fea3d034a49af
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites, suggesting it may be used to distribute further malware or redirect users to phishing sites. Embedded JavaScript was also detected, which could be used to facilitate these malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92b66546---16434618465.pdf In PDF document text
    • http://www.ferm-matic.fr/upload/file/10174170473.pdfIn PDF document text
    • https://rosycaffe.com/file/88847944599.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/rosugenidin.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/zajuderudubixemoniniz.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/5f56bb50dff2bb52969648d50afbe86c/37093265311.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f783946986---18802269649.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/6j217ei78tnut15ig44csn78i6/vumawosopanisigo.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/ketosi.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608462a327d21---62079491956.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/fidowunugew.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/49010137055.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/bumeganusekiwiv.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613698132b5af---pazatovavolago.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/befiviker.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/65291764303.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf1921a674---wopumebemavi.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/rofisovoz.pdfIn PDF document text
    • http://aimic.com/userfiles/file/tofexenamitagirerujinojos.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/5281710145.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/1db66a72a11aeca82b852c94c06100ab/tisutasose.pdfIn PDF document text
    • http://asustainable.com/global/file/xeduzarademetopowogu.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/mivekogejofowoveropobilaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=autosomal+dominant+vs+autosomal+recessive+pdfPDF link annotation
    • 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_off0000d4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D5 10928 bytes
SHA-256: 5e31b569035a62f878cd42eb88502da25feedc69cb8abd9207e06496bc44f83f
font_01_sfnt_off0000ee25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE25 17552 bytes
SHA-256: e33a6711b96f74f045f844d08dae83cfc002dae8e118651840a5eacb1f00b681
font_02_sfnt_off00011bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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