Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89eca14a9a634be…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 14:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 47171576e02f1982cf588cc628cba78a SHA-1: d7ff471cbf38b72d6cafa68b49a0c4a968349465 SHA-256: a89eca14a9a634be94f68ef3bfc9a56ed455c3c6d43e72ca5c39a1bee44a76d9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple links to potentially malicious or compromised domains supports a spearphishing attachment and malicious link attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://hkbca.org/UploadFiles/file/20210525003401132.pdf In PDF document text
    • http://pttaccounting.com/userfiles/files/gigakoxiwi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072607219c8e---lesozibovebudapag.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/70401629914.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/56374599341.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/pezapiduronajobe.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/61655427032.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/68888829823.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109011324506122.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/bunixave.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/kexogosotokumulepexekim.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/91095062882.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ne4r2ah5t7c3o10kt56ep6cb10/81427744352.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/pokabufer.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/29d8e74ae6febf48369b6d1bfe00a01d/wexoxuloxof.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/lemotefawawabavuxufobap.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17eb7d78a---pakuz.pdfIn PDF document text
    • https://birudongker.com/contents//files/48377553867.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef71eaca2---20032049415.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/71323800054.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/28590739791.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161164340c84e5---57919465683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=toyota+credit+application+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_off0000d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 10524 bytes
SHA-256: 835a899fa25a18b12bb57692f117e53eeff8f9db0387bb0330c000a5fb946413
font_01_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 18188 bytes
SHA-256: 3dc88334700fcb3ead9a3bd43138dbbc26565afed8a2782986c174b70d3cc0e2
font_02_sfnt_off00011a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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