Malicious PDF — malware analysis report

Static analysis result for SHA-256 7774c73bfc7270dd…

MALICIOUS

PDF

74.4 KB Created: 2021-05-16 17:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4c152ed76b207b7c44e2a0bb25b5ee9a SHA-1: abcadc88812f60401e8133de131d5437f59c6428 SHA-256: 7774c73bfc7270ddd87e94f8c7d75bf7f9a91b2e0c4688f8cb0c05b6d386e467
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The PDF's structure and embedded links point towards an attempt to redirect users to potentially malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qecrk64m37ccfbieicitf6rl4l/56749688039.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3vloe2326tgq5jkb01jtl0utm1/93928148263.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/39672897674.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b1ba9873b3c2d5568faa0d13dfc0d93c/dilimoxawemixuxogan.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/89123862129.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/0eku3c5sair12ph87b2c0k7f04/mijepufamuvididiwubaj.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1bd3b43b---xoxurasari.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/mexopefigazira.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/5870028163.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097ef58f094f---67352071982.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa67780ef9---bilomonejilezikobefukatu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160720556a9ee7---345278006.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/909c0b5cb72a86d9d22a11472b60f453/gebatowetiwixidunubetunij.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec3f35de46---lakovukok.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b6608e5f0cc73106023af1ffeecb8288/tixuwegariwanuwoxogilezu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160846d63123a3---87761200110.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160811de6b7073---fudojenuwak.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/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=garfield+comic+bookPDF 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_off0000e694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE694 5224 bytes
SHA-256: 5fb886b4cc37689c5db3058b00f484d35f63373de7ad41c09e71f86863065f49
font_01_sfnt_off0000f846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 10692 bytes
SHA-256: 09f3b9e17b52f9487091a39dbf034115f9fe14ed2feb697350258c94a8231dc9