Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ca131514ae99f4…

MALICIOUS

PDF

85.3 KB Created: 2021-09-02 00:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b30b3e618074f6ca31117973a67e05e SHA-1: 392f0ee581e5d532fd79b4f46979095aa82719e4 SHA-256: e4ca131514ae99f4958a4479b46a8cbaa869af8d72b7e99f93f411b74d05d445
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://orbitsecurity.qa/pro_mvp_tech/uploads/file/vadupagoberimetixogaxedes.pdf In PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a66e1ca436---67117178025.pdfIn PDF document text
    • http://goldmustang.ru/files/files/pisamajatuwelabutevilinaj.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/9hqkbn6gumbtcmln7jefhcgfi2/modalupil.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/33310d44967d12d7dd9d3bbd4f8d1bef/20542146486.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/wifaxirararumem.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b364cba49---71364435640.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cff0598c8ce---78667150838.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098914668aa7---keluboxa.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/3582979548.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1e3756421d9ba115b097e45c1f593742/wokalovadopu.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964899b8323---xojumikiwo.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8v7qf13eglf3trec9k7ut4hmpp/wakobelexidubarebulonewos.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/vatugajubufukupawo.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/jarofizus.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0abac9fbb4---68413370271.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/memabexovidelawafulitup.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/radejatatojiwavujikeba.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/16990037939.pdfIn PDF document text
    • https://tpk-m.ru/files/file/duxalalesotu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f8e3ca953e5---jipujibinudosulopad.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/43334471944.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/wavitegalamejibofegipix.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/takodalero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=english+rose+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 10440 bytes
SHA-256: c698226a19fdbaa1b2775a99459a9c41957c47ac9795bb266f2ad7b1e70940ed
font_01_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 18300 bytes
SHA-256: e5b01684c5958d618f7d35b46da7af49dadec845e5333709cefead579eb2576f

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