Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b472cd339cb9e1d…

MALICIOUS

PDF

90.3 KB Created: 2021-07-01 11:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f3447dc50e0238c06f208488d3de0eef SHA-1: da1a02d362e7304bfc48bd47c3eb3a3bec65b819 SHA-256: 0b472cd339cb9e1d0fdd9535885511875488fcc84b7653cefabd95ce347c6141
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, some pointing to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of a 'download' button lure further supports this, aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=poetry+speaks+who+i+am+pdf PDF link annotation
    • https://boyanbolyarski.com/userfiles/file/kevasutamoverunavo.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b99f4c38ce870a730770939dba1cbac6/sewoteburagetuviv.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e53330f816---31208650536.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/6955353351.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c458898f2---lejidisujerazebizadalidap.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfae6676ff---43307667558.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/xebururufoxugabu.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/pafenepetozena.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/deranupowisefujegaxewul.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd617294d43---sutodupeg.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8e1e773ff---32536779900.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/56849315255.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609148c8f00c5---datonafim.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/eb3d8357998647105a706472cea1d6dc/65801324302.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607951c112ac6---bogolos.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/14872609175.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/35267726721.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/5id6qnrpfc8q5i597ksijs7tg4/vifopi.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/tozeziwadiwuzumide.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/54950502997.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095bed966f4f---vatebajaxojoxomade.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/10462750694.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/85c1c94a6cf62f2ee8e238c26fcb9f2c/dogezupemudovumat.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16079de4293d4b---14220803467.pdfIn PDF document text
    • 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_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 10908 bytes
SHA-256: a2e95d6d6dcb6c204d8e27ad82a779a7c14c13a4c104eb0823c8a9b8090c5fdc
font_01_sfnt_off0001164b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5D 17532 bytes
SHA-256: 8fdefcff58af0e6fd5e9227a36d7ea3840ed43220ae11f5e193fbedab3aa7d61

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