Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d3d273382111c7…

MALICIOUS

PDF

70.9 KB Created: 2021-09-28 02:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eba9285bccba6841632a680bbad92d68 SHA-1: 3bff970d77cd616533b809777c638412531b6704 SHA-256: f0d3d273382111c797006818a5ca975279c1fa46c925ec0f67b03ec86cbe0890
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a high ML score and ClamAV detection further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/27ed8165f3187c63feb9b476384bcfc8/89110057841.pdf In PDF document text
    • http://qunjl.com/userfiles/files/vageba.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477df57d446---62113865645.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/kivujotekakoropavojim.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/93140937488.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/muravuduwisera.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/1150294020.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d33b2593ad---wovava.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/59963256951.pdfIn PDF document text
    • https://cardolf.ro/files/befozuwuma.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/10487705286.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-18/20210918120900457630.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/kakonixegig.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/79896466300.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/49316242853.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/xofofadarozarerimukusuj.pdfIn PDF document text
    • http://e-district.org/userfiles/file/20929355556.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0909eb0137900aff737376bd0172a5b1/41568982845.pdfIn PDF document text
    • http://knipia.com/userfiles/file/fufosobedigabusopo.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/11690052514.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/62469071293.pdfIn PDF document text
    • https://aademvegabaja.org/images/image/segejipapotaxumanugigowum.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/17437930903.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/86867761145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=crime+city+mod+apkPDF 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_off0000b362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB74 16376 bytes
SHA-256: 95ed3edb00934b71eb997b9ae8a79982bb99159a46101ae0b88394777cf2048a
font_02_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 10592 bytes
SHA-256: 34a2417f9461f444e10509f64316d10448af3befb3de7308991d1964cfadf672