Malicious PDF — malware analysis report

Static analysis result for SHA-256 040cec74e7cf3ba3…

MALICIOUS

PDF

74.4 KB Created: 2021-06-24 10:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1f0e9bed1ae532565675d2f539dc4292 SHA-1: c7b32d4812355f357d42a27a927f9a1abe5d9b5b SHA-256: 040cec74e7cf3ba37f373af2a676569c66a44be3fe0df1a100eee6a657805553
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites hosting further malicious PDFs. The presence of embedded JavaScript, though not fully analyzed, suggests an attempt to execute malicious code or redirect the user to a malicious site.

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 http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1249d03c9---gepomorosininag.pdf In PDF document text
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/ircha9e4873quqg8rh1qr84452/24905207006.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/32239467453.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb25bdd798---97458604553.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/7262751456.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9326pqs5re3v85ep8nf26sp634/fobixotedoverem.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/6uubvdu9jj2lhuiv726u1vq392/dasoloxifanalepugalex.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c016d23f282---mewudok.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f8526f547---97815895868.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3c126002b43c88881af3bda660432108/53656363492.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/56491909596.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/xasiganodezufutiboga.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/majuniwepawisepezona.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070c1961e196---75710484458.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/binujewupij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efcaa10e83---50073012834.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/60269cc84f0ab09413e6cc17dbbb2968/56755387530.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/dceb65f4cd58fdcfba06c05e23218a6a/97676512143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=barron%2527s+toefl+10th+edition+pdf+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD468 5288 bytes
SHA-256: 8754c2ae3f87bc01594150b0c7fdece530715cebb08e3e1afe27f531d490cede
font_01_sfnt_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 11236 bytes
SHA-256: 93b4184355513471b4f2d17f99ebc8a4ccb2ede7c2868732ab2c59b6adfcb387
font_02_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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