Malicious PDF — malware analysis report

Static analysis result for SHA-256 8283049324565e96…

MALICIOUS

PDF

86.4 KB Created: 2021-06-11 14:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 653d5e28263e3e2f6fa565a46be26b77 SHA-1: 79aea5f4f01d66c5eb77ab4878b4f1619d0d5284 SHA-256: 8283049324565e96968a1baabb05e9eca3792fcbc67b616a60339f4a1e2a5918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of a link farm with UTM parameters and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to downloading software, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://allytemp.ru/uplcv?utm_term=hill+climb+racing+download+in+pc PDF link annotation
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16098a630b82d5---jogunekanotilu.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a482c914aa9---2039681767.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb186d921---situvivale.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/fezalovasodigutozu.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/47620190055.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/guxurepedu.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a535b6dab78---leforazabav.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/26106796639.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/4f7f8nn3r3bk1ambbrbjh9s0l3/45032149956.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c078b0138---lerodovasipavokilopipul.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/98845011851.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/88198468368.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/df17672992fcede4638fcac33c4cd89f/wesage.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6b51238fd9cd3ec584d7c6c1b0e24659/26745023027.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949617591ae---nulezajizog.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093c26ca7480---7038849151.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ej211b3e5jj5s832gmqi0f2qeq/dikuwutusuwafigojow.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052204255112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 5408 bytes
SHA-256: 5c899649bb7444b7be6e36a14aa2e555e5ca14031a11e70a5d581938fb43afde
font_01_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 3204 bytes
SHA-256: 27b453fc3c1bb040777e0f6b8b2e5b61a5364befce6efc6be98835a310e582a3
font_02_sfnt_off00010fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 11304 bytes
SHA-256: 14d9ca7b8c37f90c182b7a59cd682aec962929892fed61bcd858c487526229a4
font_03_sfnt_off000136d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D2 16120 bytes
SHA-256: b7d3fe0f0eed6e60c79e5026c6c3c7babf05c9d359090ed5b12ebb11be5d450a

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