Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ced676e0b859d34…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 12:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2e5bc104bd3d74a1c8458273f90e99fd SHA-1: 75a3a10171a9f76f89d2fb92f710a1082ffecee0 SHA-256: 2ced676e0b859d3403f5a64c9ad4344f8fb812de9017faac16e6f911375f0789
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. This suggests the document is designed to lure users into clicking links that likely lead to phishing pages or further malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d4f44019a---kitopoxove.pdf In PDF document text
    • http://fteq.ru/files/file/82589728755.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e00e932a6e---69768589948.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/28096380855.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/21283173584.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9cec2e598f8333fe289ff30341f5e1e6/91858358998.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/92c159715777548fcbb2b255ede58ebd/newaterajaxabebugimomama.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/wagoko.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/86d2038d082b52db8b722577f6099c6a/53161390812.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/v0fqd9ijm2gbvh8sb97igngght/bariw.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/fopupa.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/f575c148a42dd208044e22be3a033214/62701180461.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/566ebecc3c81fed5008ab49fe593a316/11602173961.pdfIn PDF document text
    • https://blv.by/upload/editor/files/raxenuwowusotujiliza.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/womogejewin.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b76918757cba5bd2410d7559572706de/64724023748.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/14629362821.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/muzod.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc99f1eeb---31817630980.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/49208163610.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4f1acd065---787692956.pdfIn PDF document text
    • http://amandamaitland.com/images/file/86846019954.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2240bd258530be973f946ce377700e8e/volasajewajif.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/mb0h31ccp9e3v6odofboafhrcf/59636965190.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/47739183599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=shakespeare+cleopatra+and+antony+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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 10908 bytes
SHA-256: 2f5e91141075fad63909d53e3b3618a354086109ca8126bc2a200954db932bc6
font_01_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 18152 bytes
SHA-256: da87c86551717f56c6f1bbba838b2ed78c14ee03ae6c19c2a663b80770a912a7
font_02_sfnt_off000120f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1