Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84d330b2a7e728e…

MALICIOUS

PDF

80.2 KB Created: 2021-06-15 18:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c5ac964b2205f9bd25ce947e796ce08c SHA-1: a7c2d02c73cba3f2791447eeee336317769569ad SHA-256: a84d330b2a7e728ea340aaaf9ddff105938e6fa0fd66e2d39fbfbabaae5911c8
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised WordPress sites, suggesting it is part of a phishing campaign to distribute malware. The presence of a URL with 'movie full download' in the UTM term indicates a lure to trick users into downloading malicious files. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cructi.ru/uplcv?utm_term=ittefaq+movie+full+download PDF link annotation
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3c7b66124---6276407008.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c0ffb3427acf57bcbfb8458d8ad9c356/zekojudixuguxevibegi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/90245976257.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8248b0aa0---vudibetalorezupuzolabosol.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c92c181c---33635070209.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7668e281---34531033454.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/xarinifiz.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/89344884704.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3caf90952---puzoje.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccbee455e3---mavojopaxunuvovilisedive.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/rusavakexewosa.pdfIn PDF document text
    • https://inncredel.com/uploads/pajizadagexi.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/25469467033.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77a4edeb45---80460689844.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792c3e30099---66945407246.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c93959fe9---rotanika.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e60dc9b2d4---lubefavuzobogoro.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/79689421d7c64df13255832606bfb74c/88893265003.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/uccq26osv4tqq8snekkt8j025t/zelogezaxinime.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 4996 bytes
SHA-256: b5f6e9f27e04f06d8a762ceb156912b220f5c7f321c45893c9c93c37d1215f5f
font_01_sfnt_off00010d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D66 11360 bytes
SHA-256: 4a1950a5b4aa3019421a1890b84b545ae6c040d488b9c4925f1dee5058a2ff4d

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