Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce2bfa1165f59b…

MALICIOUS

PDF

103.2 KB Created: 2021-08-13 02:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b81875e84d8cb31a36a1137206906fcb SHA-1: ae007f81a7cf0bda5530b87908b755f3a03b3372 SHA-256: 49ce2bfa1165f59b0eb266e175a130f98a26af7594ff68c2b3366468a4d25e5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rajatotogroup4.com/contents//files/gaxepowojivevo.pdf In PDF document text
    • https://menlopark.com/wysiwygfiles/file/lepulese.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/47589033203.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609694670d563---18254035886.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072c786e81bd---pavamikomeneragijinakir.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/4978dcaf5582a953d2a18ab814b16c5f/53153561847.pdfIn PDF document text
    • https://12tiga.com/contents//files/rotufifewalokagasixov.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/zepoxesa.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d27864aa0---86622847901.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/furewibodepejijuvuxunadif.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/25972129572.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7246690272---lekavamefa.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afe48ab7a6---1220096699.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/63159385428.pdfIn PDF document text
    • https://activepymes.com/pub/file/9169945504.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/72826124183.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/5165fdce34c3e15ead0669ce27fb62bd/putajozorexejikev.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/b6856098aace40a3f9bea6cb91af2c48/tekilofexev.pdfIn PDF document text
    • http://www.agot.pl/upload/file/kegurisudovegodofoguwofa.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/jafari.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/0c6bf3faf8647376371deaed9b81963f/weluvotadus.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/84491722150.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/60293097128.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5e547114---wudewubuz.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a53ea711d9---64949535422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=define+political+sociology+and+discuss+its+nature+and+scopePDF 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_off00012c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0B 11008 bytes
SHA-256: ce1453e3c964fa69224ee1e0d3da76e36e437a8111a426eef879ddc1a55744b6
font_01_sfnt_off00014593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14593 18384 bytes
SHA-256: c5fd199d7919fc062cdbfd5a8cf4d86f9bc645fdd65f451318d9ff7886499f33
font_02_sfnt_off0001750d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1750D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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