Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2a8c41d4385e90…

MALICIOUS

PDF

94.3 KB Created: 2021-07-24 03:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5645265d175d26e14f740f6c1af135f SHA-1: 42fa3dbd026ea082a2f0d740c875aef432e22ba3 SHA-256: 8e2a8c41d4385e90fe06e6884dcf3ba77f3413fadedb64a91cca23e8914a56b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, noting the presence of UTM parameters suggesting SEO manipulation for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://michelbarbot.com/upload/files/lipifategidamuvofenalamax.pdf In PDF document text
    • https://kindeeyudee.com/ck_files/files/91568365736.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f928d425612---44680571103.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7e5dab3e---74329404880.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7bdd1d534bb4f6432e6966596190d5ba/xadogitofemafepu.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/51fd39764edd7e27468e67e5a1c88e79/16423751768.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/24a851fc9559e31fb336e4db1cc44bd8/17244227893.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/18f67ecef72cda03a75467452a09fc02/12278225865.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/360097751.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/333d014efc1a924d95d54af417883f27/sefijoganaguxewesugele.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/41922678696.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/fupumibopapezalapidisu.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/xegevupifepuvef.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1625788078.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/cbc1c6df6d2096055cf93929b57cd055/zazegogujazigi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c39efa14114---xuvunawelogafaxud.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955286af7fb---sekurusevu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160874297774fa---38434611471.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a8afb7f4f---zinovaba.pdfIn PDF document text
    • http://cobbpaynefamilyreunion.com/clients/862770/File/saxisebipirujuxoti.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f8a97b1d---38438524448.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/38467745228.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2132fb9ff2322922fe78dbea359f1f27/57521495387.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/p599qbtlnohbff3l04d71effhi/41999121579.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/caa92a43c703e677f3707eb73f478785/gemudorepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+age+does+wendy%27s+hire+in+californiaPDF 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_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 17540 bytes
SHA-256: feef700b88f6ac297da804cb2bd5194fbfed2c7cc88362514802d7a1fae128a7
font_01_sfnt_off000139be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BE 10984 bytes
SHA-256: 92fbcc44c37d383470f249e63573d1c576221d6600356d355233cf6cd8c1fa80
font_02_sfnt_off00015319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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