Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8f69cac2d752dd…

MALICIOUS

PDF

127.9 KB Created: 2021-07-20 08:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cf30d2a6c8cf01070ef8c245d8d3635b SHA-1: 1dc94438f8fb2eed0205851b5a7379421ae3bc07 SHA-256: 9e8f69cac2d752dd0079f9c0a9ce08740cd35af387ec37b2a683f7ffde4dfb2a
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to these external links, which likely host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4647083a54---xawegiduwubavomafetunojo.pdf In PDF document text
    • http://parkhighclassof60.com/clients/871169/File/xagexofuzusafosami.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/de1119d25f859d136b3d363cf0ca79eb/sazezuroribugipi.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/61518589491.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-16/20210716051503435920.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/bemezozemofopesivisav.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/84728436766.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210714095205.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/17983099195.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/923hm7ienqk8fl32vd5g74i049/59425341607.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607405f351890---kabedewupumajuva.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2189f37140---13680443472.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/4297710ceaf7e1dff5172a1ff6128062/91942415803.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/as87nbguj8v0v96to456jeql34/japumimapolifupijipufen.pdfIn PDF document text
    • http://parentini.it/userfiles/files/rixigoxapirifotovonago.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/72075354095.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d632dd78ea---21028905806.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b557320d5---95645269252.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/69629625546.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/71897105998.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/edbc353ec32014fcbabc1096d3063aa6/13308385459.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/13923955039.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/velofesom.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///bupoje.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105280719243497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+western+heritage+10th+edition+pdfPDF 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_off0001910f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1910F 10952 bytes
SHA-256: d55e72fd2cdd64a046206c52326e127935f1c28e5143f59e1d904301d79b56ee
font_01_sfnt_off0001aa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C263 18200 bytes
SHA-256: e3fc34eac237c111f19c9f2ff06038b89814bf6aa2097ed3dbc58cde9aa1fbeb