Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ee06e1c857c917…

MALICIOUS

PDF

85.3 KB Created: 2021-07-20 02:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 95918f277c2289819b4aaaa274103578 SHA-1: a76e5080b93d668284b19ce1e7d1054c981330fa SHA-256: e8ee06e1c857c917d224b825c244dd909a0e9aa6a85e5cf600961583399e4d7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting, indicating a likely phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tecsun-moscow.ru/docs/file/romogavolemurabog.pdf In PDF document text
    • https://kaptenhoki.info/contents//files/tuvivugetizabepenu.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/jaregager.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/81992059454.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689220a84b---ludekelivi.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160821d14b6f6d---70741102850.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/58344207904.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d4eba57a---18056795665.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/jetufivukotaw.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070460b3e010---dekerukirivexatut.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/59023551489.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/sosodo.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/vixozeki.pdfIn PDF document text
    • https://educhina.mn/editor/files/26890559265.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8e5cf2c84c207dc5ebcbf0022e7cc34a/wosonunivokulevasoman.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///21109046014.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f76d32333e---42079185749.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e17c35248d---tenenilelugoredalanud.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/65373300819.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/14834243610.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0513cb63cc---7183655146.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/68818e5c4436ee45382b8ef8aef3d5ed/2978449549.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/jixebalumopip.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18fb412e3---66310297356.pdfIn PDF document text
    • http://canvangdientu.com/images/file/97268252154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cockroaches+in+coffeePDF 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_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 10412 bytes
SHA-256: e531c5c9a786c3847a15248742241d2f64d2637b2939ca17ff7d2d4a355fbf8f
font_01_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 16704 bytes
SHA-256: fd8d8a7e850c11d4854d5406c5003033dde1bdf5394923686f8c3786847d08a7
font_02_sfnt_off00013018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.