Malicious PDF — malware analysis report

Static analysis result for SHA-256 f852efd0e33e4e70…

MALICIOUS

PDF

85.5 KB Created: 2021-07-01 14:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 63437423707734486284b47af8aaf515 SHA-1: f34e72773b2b5b7db703343543b9d14f96bf0dec SHA-256: f852efd0e33e4e70b79dd1bcf7afc59482c6139bfd25616c1562b14b3beb90ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous embedded URLs pointing to potentially malicious content is a strong indicator of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081024e236a8---venaxukegos.pdf In PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/ronujexukatisidegudefevap.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e58c73b8bdc2377be2aacdd86db7d316/6421359298.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d53e85345---19310752670.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/poduzisotosabulepirofe.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/kazemozupuz.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a22e5b4f---63450203318.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/wuwejutekan.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/30529143408.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/wakemiwe.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e8b86966a---disugexoxun.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160804694d6ad1---dogitokojeme.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/bubokidinifural.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/246eb09594548d34c2fe4206f99bffbb/pamivun.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/gutajobafu.pdfIn PDF document text
    • http://dhf-china.com/d/files/dugejewasusizetiluvute.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f08246442e---59336490427.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/goxamorotiniziziv.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c665a2a36e---27555143218.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/17778412276.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/a98beea445d2d42ed07f4920bfa6be2c/vokewolulakipo.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/fukawokatizev.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160894277d9127---kiwogobivetoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=reason+of+fainting+in+the+morningPDF 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_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 16180 bytes
SHA-256: e9f4fb71eb899772829740bcd680bfb14b59d8909cbdca4b35df4d74ae0814c4
font_01_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 10660 bytes
SHA-256: 7e63117a3000c18ce698479d52cb41f4c22eaf7cecc43a2d8e6d0a9f24d5d98b
font_02_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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