Malicious PDF — malware analysis report

Static analysis result for SHA-256 445143f19b4a0205…

MALICIOUS

PDF

224.3 KB Created: 2021-05-26 08:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0481f9173f31dd04180125cfc012ede1 SHA-1: 0601f1213317db8bf82f7bc6a7f4c91897d76b2f SHA-256: 445143f19b4a0205f6780c2a0dc43cef895e28b7bde2fa8bd2d528234ea6a630
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to an 'Android 10 autoradio update'. Several embedded URLs point to compromised WordPress sites, likely serving as download locations for further malicious payloads. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/7dd03138da4947d09b95fa7084a9aaaf/rivodakojugojanisusisidet.pdf In PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ed86b4ce883857594fa39ef705edc477/fetipuv.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986e6fbe6a4---78270828642.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2deeb0a5c---92114998360.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e973de49158e75cd20294fb9ad90f0b1/56242692982.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/969aa90d199a2187ef1712526d1ce7d2/6427190620.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/9b855c66c420fa67a7dc95cf6af6dd37/bozekoweti.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/78905810934.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/da44beface0600c3db0fcced962df062/78971699258.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/92l62dii454a7u279pjd2d3an3/88516064946.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6be2e9b6fec4ccf576da29c577d588fa/bedalinepazipokovu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b01fd143ee---jufom.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e1a63123---subabufojekugob.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a5ccb02773590df8b633795ae7148b5f/47174355135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=mise+%25C3%25A0+jour+autoradio+android+10PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00033032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33032 5296 bytes
SHA-256: 06eaf338d784f9006a35c0665e6381d5b3c783a3b0fb19f32c23269af162daaa
font_01_sfnt_off000341c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341C8 15128 bytes
SHA-256: 4ad3b371ae92dcd29c7d86004f8d0084f7b40d3bf720f5b89c2e70e5bb313bbc

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