Malicious PDF — malware analysis report

Static analysis result for SHA-256 a602024bc6c659ed…

MALICIOUS

PDF

91.3 KB Created: 2021-09-11 00:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 755f1f34e9d34ad540ec1c15d7cc094c SHA-1: b5184c42a9eaab776ff0f7ad1b4ed789c548e655 SHA-256: a602024bc6c659edc7cf44ee3043fc9b663755afaf458d823ffaf2cd174184ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it acts as a lure to redirect users to potentially harmful websites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=50+shades+movie+free PDF link annotation
    • https://nepalonetours.com/userfiles/files/36369128721.pdfIn PDF document text
    • https://dacola.com/upload/files/2092339347.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16132a0ecd05ad---59847174458.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/48484690632.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/82afcf853c93d4c388bc66b69d8ebc9c/varisoko.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/63864232800.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/ziniwetugosusapumak.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/dakunezude.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/16640992201.pdfIn PDF document text
    • http://blueyee.com/upload/file/072119084920.pdfIn PDF document text
    • http://dongphat.net/upload/files/22162015717.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210906101754676203.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/kunagijewum.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/zegarenuvepaxivupoziwu.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/kafonebiwukorazu.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/zowodaba.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/vizixonufapatufu.pdfIn PDF document text
    • https://kimcert.com/E/file/titezuledovuletitilezu.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/simiwet.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/maguwalulodawabefabiruk.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tudalumabitelawibesobopel.pdfIn PDF document text
    • 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_off00010281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 10596 bytes
SHA-256: 5461bbf3dcfa0106b240a8245f4a26de52821b6fc7df4703d8f9d05eec748479
font_02_sfnt_off000132d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D2 17376 bytes
SHA-256: dc5a8b29c5d27acfa8eba9e83183153a22728ba8740745385aeb34a6730bece8

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