Malicious PDF — malware analysis report

Static analysis result for SHA-256 207a633a3a873315…

MALICIOUS

PDF

77.0 KB Created: 2021-06-29 10:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 764809011ee9a32b844e7030fc734485 SHA-1: d2271525ee68ec4533eab9a01aeef8eacbb8c745 SHA-256: 207a633a3a873315e9a307a09363a976b52241cf5fed210a57946ba5e6edb7eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination or distribute payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sarlampa.ru/upload_picture/lekisawurugax.pdf
    • http://aqbnb.com/uploadfile/file/69209855028.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a843ec4d4d6---serup.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609a92803eccc---62082733814.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb88c93e8e---dizifetiwupokigimule.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/8sg769tmqthsgptva52jbp4gi1/vavazesif.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/4b2e21f1765b0fd270edd07517b6e618/24815303254.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/73e1b7b405220012f8e870e7916e221c/kaxon.pdf
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/naluxarifi.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907f6e41260---tesaxunezegigowon.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802281e13a9---jakirusasijonavurefenewi.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/0fe97ae0ddc608456a2e926322cc5f22/wirewuge.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c35e23e5e---xawumunazokonukaximegota.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/0vffi30s26rsv8ho9nnm6039fe/pirenejinopixipesinikaxov.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/b6c6085336db519d0d6a99f79002c2bc/93575704248.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/c36fa63bf1582cd18ded8de4ff89fb58/letubuwuditob.pdf
    • http://lukinserv.hu/file/37692099093.pdf
    • https://zemiigori.com/uploads/file/91451539686.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/60025198301.pdf
    • http://aviseco.ro/userfiles/file/11495259439.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609accb16b11b---ledipolewa.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/do35vbkgfaklnfibn8h68jhgev/17232521707.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7edae16c0---11473485012.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=among+us+valentines
    • 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_off0000ca93.bin
fde95341bdfd08f8c40ce71a5eea9db76e518459c48d6ffe2254d2e475c01499
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 10496 bytes
font_01_sfnt_off0000e27e.bin
e4b26109a3ffd863ca28cbaba2deef1250efa43d102494334f3acd1cbc421307
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 17004 bytes
font_02_sfnt_off00010ef4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 16792 bytes