Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7f780c98d493ec…

MALICIOUS

PDF

80.4 KB Created: 2021-06-30 07:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 536080aa799f3f7b7cd08a956f354a66 SHA-1: f30e3a50cce0be5a54d4ddd8ef1e3dd538d298ad SHA-256: db7f780c98d493ecd6e8e3e473a77b05fafd25886c3fd5b875f83c53bdef5902
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://ketchas.ru/uplcv?utm_term=off+road+adventure+tours
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e41738e2b9af28bae16eb37abf9f2a6f/75055325449.pdf
    • http://acpiindia.com/userfiles/file/88266071516.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a510b771d13---fazotafusodisexuna.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef77e5153---notejorunebavezetuximu.pdf
    • https://dodomacnosti.net/data/file/66889618441.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/90571211589.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pp7hv57lb05h1qncpgbg64h735/fewopubefalolevekovosupev.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/wefofoxaxid.pdf
    • http://cherryontop.pl/upload/fotki/file/wifofizitokejanedesuz.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c2d9f3e77---serosofavunupuj.pdf
    • https://swift-tw.com/lcc/upload/files/15811324326.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ee9068e75674891d7a602dbf5f70fbe2/29590593633.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c4c1b9e21---94388484880.pdf
    • http://gerd-pollak.de/userfiles/file/powuxulenogorar.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7eff52dbf0---votolagabobatuni.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/10b0e6fe939743f5ab9766229b95adb6/mufomebipikosumifat.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/607b4399698cc417e4375ac57d58e143/rimozokewitejapazivox.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070b4df9be40---88173969727.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a0742195b11---karek.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b38c75727f1---kipenugij.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843432ec224---xefimumoman.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4opfdf22nvjimhgkqo2d1lpmul/mojava.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3e90ef55757e0198336228910eb8b925/49162019509.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c19c.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
pdf-font-stream PDF embedded font (sfnt) at offset 0xC19C 16344 bytes
font_01_sfnt_off0000d791.bin
5a9f61bcfcc627648ee765e6946351cf72532c121bdd31a3338464b5d18507c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 17256 bytes
font_02_sfnt_off0001043a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 16792 bytes
font_03_sfnt_off00011c51.bin
ad2350e7943abcc923aecad42e258f171e3be6ca38484931a48f4416a1798b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 10400 bytes