Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da4dd727cbaf931…

MALICIOUS

PDF

89.7 KB Created: 2021-07-25 05:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 0ec6813b1ccb76ae30df22e2a74ef93f SHA-1: 118e6a11212679ffa621ec80d0c5028dd5e62659 SHA-256: 8da4dd727cbaf931e76a2a0a22e2accd47c6030d936bf70dc37b90e5d556344e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, likely to obscure the final malicious destination. The document body was unreadable, but the heuristics strongly suggest a malicious intent to redirect users to external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608108727437a---duzugajetusuxobijifaxedaw.pdf In PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607eecb4a163a---lamezijotenurewiriden.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078282ea405a---80279423159.pdfIn PDF document text
    • http://firegallery.ru/img/upload/lofuxusugad.pdfIn PDF document text
    • https://bestwaynepaltrek.com/ckfinder/userfiles/files/rotojujapotadarafunivub.pdfIn PDF document text
    • http://www.bash.cl/media/file/kosasaxizefovosad.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/jimumidoval.pdfIn PDF document text
    • http://allasclub.com/campannas/file/74655233256.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/34385441893.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/70363533785.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/64jrhi9bltl7d74orrc03o1km1/98803414725.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210717170836.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/t9q0vdhiqg400i478oqufnm7ge/79612437196.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160cfef5f8f77c---notawobejekerala.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021071722570_288404116.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ee007e1100e---49353381769.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f851b7345---joninaxiregavusotumejel.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00eeea50d---palogopuzef.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/giweguvuwizujexa.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/60244559137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=need+for+speed+most+wanted+apk+free+download+for+windows+7PDF 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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 17072 bytes
SHA-256: 0e847be649d7eb259ee2caacaae2af41b244da535d09267b98e2a321c2e1a49a
font_01_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 10864 bytes
SHA-256: 21b714a321241d88810867a37cf1f19beda51a0b55dceb7b772de96a338946ae
font_02_sfnt_off00013fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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