Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9f1ceb15c64e1c…

MALICIOUS

PDF

126.2 KB Created: 2021-08-07 02:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d560bfc39a4f25f1045c8c96a49379d6 SHA-1: 02fef8d9295a73ee727812946d115f88e67b6289 SHA-256: 9f9f1ceb15c64e1c6ca32fa80e6cb0b3d2f18ac7173905521d4c032655320a20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://ises.ca/phpsites/vertical_living/uploads/file/nevuboxitakuf.pdf In PDF document text
    • http://icltindia.in/userfiles/file/34229400623.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/gizozesufifilizorox.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/gapiluwamovuzikozapidi.pdfIn PDF document text
    • https://egca.fr/userfiles/file/41015645460.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c215d102c4461c5f0066b610fd849862/16507376157.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/43288243606.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/pezowo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6eeb391b40cd8331f879520b02a226f0/nifag.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/b50cb84cb6db4157ce856e3d4066fd1e/rataturisiwibozaj.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/si0gir7g8k2fmcan6qajp87irj/46245769023.pdfIn PDF document text
    • http://wajl.net/img/file/202161513640.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/q3b51dj0lf509qcb5d2bh78r42/dosaka.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/r6me2mertj2v56pq91fe6sknq1/94712890621.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/49afeb821ad9a76ac842fe6e9caf67c1/josojaji.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/86220833549.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/56275271580.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/katuxe.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/tosopuviwonatodategesu.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/51855454962.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/383ed6327f47cf0667490ffa233526e1/46180584344.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/4ad29014572d0a17d7a027390771cbad/laxev.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zutuzolewefavisedipaxosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=texas+warranty+deed+form+pdfPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18972 10784 bytes
SHA-256: 1bfd28a9f546e0ab316e8d1892aaa2f3261344b1deb8486d4f9afac18dfa4e69
font_01_sfnt_off0001a26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A26B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ba7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA7D 18336 bytes
SHA-256: a1e39c2b64da014be9efb5a0e1ebe1f7d8badb973e2751f94c71bf855b685915

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