Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd8801d53f2dadd…

MALICIOUS

PDF

74.1 KB Created: 2021-09-07 16:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 418b763c9018627e701effdd5eed33f5 SHA-1: 749612b9098b7ae40e8c9dfb32d3fd5092d8baa1 SHA-256: 2dd8801d53f2dadd88b9c58e0349538025624a80b01a361b6a277dfc98a5ba06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://crewmak.ru/uplcv?utm_term=pungsi+asites+pdf PDF link annotation
    • https://pakistanchristiancongress.org/userfiles/file/81575074858.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf06079b00---zepigelowetabefuzer.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/vawixewife.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/zadetepabuvizogob.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/xumitidujatefoberidito.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/35024052395.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613429db629ca---lanejiresofuwolov.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dca4a57b01---96550658714.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/37474817293.pdfIn PDF document text
    • http://eternoohydro.com/d/files/33588171204.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/57428108853.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/sibezezemosuxiluzuw.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c047d7abce2---93732786688.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/dilasativatigibigoti.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096341573cbf---lexilajomijinij.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed67b60db---lalezozapejowubekal.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3dbe249d7dceac58f03ae71aed76460c/51294221210.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/95513137023.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/xegitovasu.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/modofef.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/teramidewetunosugivisasas.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/s7hke1gpm263vbmttt0g94plvu/4424807672.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/wugepasojitefixajedorog.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/fofevuten.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fc48f6d859ca40a322d65b6723bec4b1/34592912847.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc3a6b139d1fe603545d17a9a31a9075/vopumuzelevunixuvimaruv.pdfIn 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://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_off0000c371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC371 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 15524 bytes
SHA-256: dc479bf34953999ac4a23ee2453802b41ea9dc1190f20e328f3b1841a6bb8f52
font_02_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10508 bytes
SHA-256: 39c86cef33065f21e06aa01797cdac60e3c9e737f10be874d04d3b30b42b358f

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