Malicious PDF — malware analysis report

Static analysis result for SHA-256 886ed1e913222860…

MALICIOUS

PDF

103.8 KB Created: 2021-08-03 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d25ab4ac0e7adfbae6e6a55ff6b8e38e SHA-1: a1f0c47dd1f8d506217ed2bfaaee7c07ec25c63f SHA-256: 886ed1e913222860d6deda3240f700072d2a50936374fe4b665a9f2914cac273
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://fincasotilloviejo.es/files/sotillo/_repo/file/4431882595.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa628c424---6140393557.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/59160a92b08e814c39591c78be5b68f0/31586771346.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/sixamovosesopakut.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/zexosadulu.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f127b45e5---kudaziz.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/1442777067.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/xoruvowiwuvutabila.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/tidalomufomevodifolomum.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/29507645265.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/43420969032.pdfIn PDF document text
    • http://jaika.in/images/documents/files/nafipejegunazaxekuguja.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160774c0f706fe---lovonelozejodarelalubi.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d99d5cd43---96507787800.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce6a3260e1---99918370632.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/fd3dbafb4069161ff6023bdec8de44e1/37607679746.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/fl8qu9f8av5jp27stjpu9q7jt8/49278266981.pdfIn PDF document text
    • https://digireg.cz/upload/11185538175.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/79048509881.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/80999736d8bb9cee82ca996bbf83a745/33878795591.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c88ceb598---72240066622.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/sevowalitapelududubagavu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fb652d420---70098735707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=zombocalypse+2+unblocked+games+6969PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 21388 bytes
SHA-256: ebe13391a7cfe6cdf8de4c3dd940f8b2d54b7ecc141cf5e43fa81e939632e137
font_01_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F3 1888 bytes
SHA-256: 185052c25e5ae7865cfa48ce5cd3c0c6dace874f7c1d25df33bbbca7baa6055d
font_03_sfnt_off00015eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EBA 11432 bytes
SHA-256: 8a50c18d6c538c3e9a33b40d8801f4648d6c65dddda9a1cddfbebb8190e11d0c
font_04_sfnt_off00017954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17954 16068 bytes
SHA-256: 231b5e3e506f4b11caded8bd9ffdf32be0549fd7bc1c531f7c21e8c5acab9f68

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