Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa142fa2c760593a…

MALICIOUS

PDF

91.5 KB Created: 2021-06-27 08:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0dd01c848376dd39e0fc64c431391cf9 SHA-1: 3ac989a981fb3fa316face5124d7b201fae9e22d SHA-256: fa142fa2c760593a5d1d43a8167eada1af97ccef7ceefa630796b391e1c4f603
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF's primary purpose is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7222

Heuristics 5

  • 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
  • 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://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/882fe4723a4eb03c96346015272f1622/24033951745.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad4d2ee54b---80309887576.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b980508becc---murozofapexedetaxu.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/75c857f66e7ae24f3404115d2c2e6c97/tipokesuturize.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/96230503031.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/61210479919.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/dijoxefozogagatefixelama.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becb3670dac---zakenisuwi.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/feparasulunomofusufe.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rf7pe11vcnm6kf55p9eglvo332/dogufipuroguxigijemal.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/33099251640.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec91bb68db---96082484286.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/xepilemodapofodogopa.pdfIn PDF document text
    • http://unseretochter.ch/images/file/42405389008.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/nulekenoxi.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/risasarikole.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607af27a24b45---31456248693.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/mulumijixabovijiku.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46727592f5.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077fddb39e59---93010527721.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/101482629660a80fac47405.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/goliju.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/95596537946.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703432882e3---52644867069.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa90f6cb97b---nulevivapijagirozuguw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=modification+meaning+in+englishPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 10816 bytes
SHA-256: bb6ef184d1ec66f8a0d645818e14856e91754db6159b2aeac4977a72e984fa53
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 19160 bytes
SHA-256: f309042f2e56693bc4871c0e07e49397c6135d96daa4af17b9462a48d5efca03
font_03_sfnt_off0001572c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1572C 16720 bytes
SHA-256: 3a6ccbe924e6050da22cbf7c8b2d692b957791f508fb15aecd07e0ff5cf2bc1d

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