Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad054957a68348a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 08:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f2c06faed4d08243214dddcc0a4ce2c6 SHA-1: 3e9ef45d4bdf751cb8de472bbe2173a875fa5609 SHA-256: bad054957a68348a7ee0d288c0ee12e5e23ed03612f13d5012fcc5fe989c869d
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs pointing to other PDF files, many hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were extracted, the structure and URL patterns suggest the document's primary purpose is to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ginniglobal.com/uploads/file/ziriliwur.pdf In PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160779bf6e2c7a---rewar.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/zetalutaripiruwularire.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/42935928398.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/dumifuvobinifosaritejup.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/80701917112.pdfIn PDF document text
    • https://istanajp.com/contents//files/48452367374.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/dibafemilagemirorefam.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/zalofifudutuv.pdfIn PDF document text
    • http://boxethai38.com/upload/file/51279542949.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/40270286157.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/25743834335.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/01cbbc27d6fd4cfb1c10f79a8d0ffeaa/gevow.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/6990e269ea3fcd6265e7e216f8b472b2/71809207291.pdfIn PDF document text
    • https://tsolisp.com/files/file/87002068921.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc23a8f346---47875004466.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/37995945620.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/50557806113.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/zoxav.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/4l2aha6dqassbnklb3qucq89cd/janadesolexafejilubid.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/luwodewekejaperipedapaxa.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/32181136040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dedolight+dled7+manualPDF 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_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 20444 bytes
SHA-256: cac2e46c0565b92fd76a5b36baff09c8930e356ef68cae15e7c966066e24ded6
font_01_sfnt_off00011152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11152 10580 bytes
SHA-256: da075b663f9eb54238941a22ecf89e6b49132f7a22731978aa71642061edeb0c
font_02_sfnt_off00012914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12914 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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