Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd18f7fbbe57b25…

MALICIOUS

PDF

96.5 KB Created: 2021-09-24 03:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 305bfd9f1b0b140e210966288a26673f SHA-1: 3e247ad9128c16a484a357893abf1d8d59cf17f8 SHA-256: edd18f7fbbe57b252884b6d285786bc16ea2750e09ba3d03bc82a3996c5eeb7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a031220e9f---zifafomuwej.pdf In PDF document text
    • https://jf-orvalho.pt/userfiles/file/rowupokululi.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/jexato.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/godetidodililomap.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/rubozu.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/48789011311.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/509abde781482dcce0a7e6a016a9036b/35678598304.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/gugikimaxefemam.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/bugikures.pdfIn PDF document text
    • http://langyupharm.com/upload/files/67238232668.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/95800725614b81df5c936.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1632388090.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/15246242893.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/lorubosobefuta.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/75279933829.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/29767901611.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/88911035327.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/podilesinekaganododajipu.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d98d975f3---jureru.pdfIn PDF document text
    • http://co-mit.com/uploads/files/9645789439.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/sogamorazupujedeluwa.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/loxezopaginokurisalujuna.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5c07c03a3---lategaxagogexulixibene.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/54265094517.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/69271891850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=brahmotsavam+full+movie+freePDF 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_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 10596 bytes
SHA-256: 50d2d4f59d1f5cb00e1fcf761aaf2354b997ff679f3c30a15f2e4deaf18b7977
font_02_sfnt_off00014658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14658 17712 bytes
SHA-256: 27f655e54925aec876790830fbc3f5f7fd69fc49e94c8dbc413a84443264212f

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