Malicious PDF — malware analysis report

Static analysis result for SHA-256 297d1ad42ea2dec4…

MALICIOUS

PDF

85.1 KB Created: 2021-07-21 12:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d65766e42271ea645d9f1aaf47efb85c SHA-1: 311a8801e0b6bbfe20dfbf33c3b62448dab0b5b6 SHA-256: 297d1ad42ea2dec48b4eaa74c3baf38b9eb370bca8742508b9732bda122f3447
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of a link farm pointing to compromised upload storage, suggesting an attempt to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab83ef00a83---wobepar.pdf In PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/54f06aef8eb6b35df4f25f38fc868dad/34745150208.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/kubunamapakisedegitumogo.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af78c1090d4---gisisosidawamilezadomoto.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/156012547.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ad76aa2d0c85ef80491273071e39999a/84667610604.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89e5a11d1---67768036428.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ece4a9cfe---8337600006.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/saretipuniguwobunivulun.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a218e7791---55333007529.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/25396485905.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beedef250b0---20079863896.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/rsjhaanfrfuau6pbofkn3k0bll/34386764024.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/91452854844.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/20126613187.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/54503343984.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce235b19a5---73380923748.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92edb379a---91864276486.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/falusakapodu.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160acc925be1bd---tavarabofurin.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/17996074528.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/lezuv.pdfIn PDF document text
    • https://aashianarealty.com/file/niliduraf.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210622194145.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210621225326.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/49671899814.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f12e2e57---dinefagisotaweka.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/43934245569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=there+are+no+secrets+to+success+it+is+the+result+of+preparation+hard+workPDF 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_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10960 bytes
SHA-256: c275fa96266cdf3cf2232080ce510db3dc2526ef074488e98411ecb16562835f
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 17340 bytes
SHA-256: efac61dccd717c6008eac6529080787b07d578c11d1d0bf230df1ed137d50ad8
font_02_sfnt_off00012d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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