Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdcfe862307c6e0…

MALICIOUS

PDF

82.6 KB Created: 2021-09-08 03:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9db6db1595933347e5a878a4e8f5af59 SHA-1: 18c448f68f29a5bc57f1486dd7f1faed4ffcc6dc SHA-256: ebdcfe862307c6e08d783955a05cd87123fd87a42c9c9cd15eca889b1a825e93
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The embedded URLs suggest an attempt to lure users to malicious sites, aligning with spearphishing tactics.

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://hanifeugur.com/image/files/32988370917.pdf In PDF document text
    • https://butchercurnow.com/img/shop//contents/4889425944.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/pebipenobekojebamanofuse.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7aff0e5bcfa574d15752dc9757daaa69/bamizakowogonojomob.pdfIn PDF document text
    • http://timesofbangla.com/uploads/files/88963391529.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/26050511493.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/56273157059.pdfIn PDF document text
    • https://aokman-drive.com/d/files/suzuvukobevexivini.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c11e097833---nafasivimigamijukokesina.pdfIn PDF document text
    • http://zl369.net/userfiles/file/79068596697.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/cb8n4um2vaudjbumbbrbkabvpi/xegotibesop.pdfIn PDF document text
    • http://hotstamping.pl/files/file/23671871236.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/vadunarojebezekuwuta.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/mkfisnaiqtpaspbsqgof5i8in4/70220971085.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/xurolesomumatuxo.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/gorifomevifezanogotimare.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/48234775230.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090158c00cc2---xepegitanamuvudotir.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e1d338fb34---luwubipijijumitivakib.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b1055fed3d369b21fa7305526b8b5f12/34725610787.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/kidolosujosigekobubowas.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/b7ab35e85156e20abef23f96cb798b9f/75011387862.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/dufinodilugemuduge.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e81b553e0a---33301159575.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/zavinodibugosezunemol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=welding+blueprint+reading+worksheetsPDF 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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 16804 bytes
SHA-256: 2fc3751a632f37af1ea1d0aed6adc2acbc800c2abbdf6c7ebda9581f62209cc4
font_01_sfnt_off00010b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 11084 bytes
SHA-256: 669b8e5691133c3f731b688f004afa054f6044b95d056deb421f7917664cbebe
font_02_sfnt_off000124c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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