Malicious PDF — malware analysis report

Static analysis result for SHA-256 97253f8d85c4ffcf…

MALICIOUS

PDF

77.9 KB Created: 2021-09-12 17:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbdf52b073ee8d678bd5f46a21e7fd09 SHA-1: 64ecb9dd93d47919e8bf2091e7e4b4b888dfd7f7 SHA-256: 97253f8d85c4ffcf2f43eda820326ade017081b1d0e772e5fb0bd56e303cfe15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=ott+local+iptv+shqip+download PDF link annotation
    • http://novichiha.ru/pic/file/59159014885.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ko86nqpb2iq2no6c75ifgtmkn6/dolifovuwasesutujet.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631051764.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613813f2b1fa2---gabadisotok.pdfIn PDF document text
    • http://ladna.pl/user_images/file/juxela.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133e56dc5738---dodupinujumato.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/20993802899.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aebbd88c8---95494779677.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/37045726468.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/58242429734.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xiboraguzipipise.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/61179991916.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/86523451872.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/nabiwijebomekurigiwidatip.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/88589794297.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/pupito.pdfIn PDF document text
    • http://www.centralperdana.com/file/89581725000.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/63198833722.pdfIn PDF document text
    • http://techmechengineers.com/uploads/jomenumejawewowejata.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/91408981609.pdfIn PDF document text
    • http://wdnederland.nl/file/zapizukoxijozofujamireki.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/50841443290.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613791c630d84---85599254116.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/sifepufobamiwafulef.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/12716241225.pdfIn PDF document text
    • 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_off0000cbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 17612 bytes
SHA-256: e008d1ab4ad348c165206cf68148b51c44ea4e4692e5abea76c38a17cf37b72d
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10700 bytes
SHA-256: 95a33712a09cf2df52112ea4f979188bfd5db8a55fa7340d0120cc7c52e64de1
font_02_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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