Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66201dae79f5d9e…

MALICIOUS

PDF

88.2 KB Created: 2021-07-08 01:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fc1b642b1347782a582dbf4d0cb4976 SHA-1: a654e7249bd6db14d51e3ce3adcefb3bb4722e7d SHA-256: c66201dae79f5d9eedafeaf6080028f8e8318ba9645cadf86bcccfc99cef546b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to distribute phishing content or malware. The document body is unreadable, but the presence of numerous external links indicates a primary function of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://abogadosaguilar.com/ckfinder/userfiles/files/kuranixitub.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/5f2fd5583eddb2ae5f58d6326a7572fb/16559275746.pdf
    • https://ovth.ch/userfiles/files/gewufurade.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e6ac38572---gijuvalafigoludinagot.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae22f2cda7---34932409806.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095254bb1253---95108237676.pdf
    • http://agrion.org/upload/fichier/77219258945.pdf
    • http://phrabat.net/UserFiles/File/bawewurivovelelubol.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076001e1a0a7.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce90b0b3fa---najozalukufi.pdf
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/zazuxipa.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607008b938cc4---ruvuwir.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/32c25de3883801ece75df761ef8990d4/49106481070.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d5c45d05---66251956889.pdf
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/44203122822.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/sv4euegqjlgmgu0qg6afiajgqs/mevojevatijunujom.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4c2bc0c8---14031373752.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160982e594224a---32615803703.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a725d77e1ae---tunabinilufakana.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0b1ec85b---36390039316.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d40cfc6249---xelimiwulo.pdf
    • http://sacmacbook.net/userfiles/file/zoxupewipajilagukukujibeg.pdf
    • https://ruiguoex.com/upfile/files/2021/06/03/50190460993.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=why+is+it+called+soccer+in+america
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AD 16792 bytes
font_01_sfnt_off00010ec4.bin
98999aeb59b5c7d0e8a83ae0ef0f731bbf8b7adbe8a41da311338afa1334e709
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC4 10740 bytes
font_02_sfnt_off0001274b.bin
56dac3a511fd8dab8686f38ca493836b6e9d625dabd5a6c0e71ce7b8fed10daa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1274B 17144 bytes