Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d532d4a8501658c…

MALICIOUS

PDF

95.7 KB Created: 2021-06-26 02:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c35fc07e6a8e00f5e3c95bdba05d69b7 SHA-1: 7f129cebd1ff30ae8b138f53496ffe10077e57fe SHA-256: 9d532d4a8501658c0fcc81be6a01ed2d1d585ee0ac4fc03f13799e2267603009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://dribblebar.pl/userfiles/file/sazelozerojana.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/031714d0cde9aaf290088a0a555f088d/jujuxukibaledawevobenaka.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d3e62b34ea5e258bff4a503d34f7d7d6/48907097195.pdf
    • https://xanbiente.de/userfiles/file/mexukagotirimedafivi.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gururasuxemafenejeke.pdf
    • http://fouladsazanco.com/Upload/file/nejelifikezuziserutemi.pdf
    • https://hzautomatisering.nl/userfiles/file/38558440858.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160828c04561fc---4183536352.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4431ee9f1---55088101246.pdf
    • http://igabana.com/upfolder/e/files/20210625054551.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e66365aa957bdfc99469fe29e2627804/2275773578.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fd5fc224a---kolakeliwediked.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5cf56d50d4e5ec45b42c750b47912e63/wodolis.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gsilacso1r78nfuujr7lsmhqf4/xulidanikobuwa.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088684b574bd---77141591565.pdf
    • https://go2germany.ru/files/file/nuzat.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945779c4812---53660426893.pdf
    • https://alamansyria.com/userfiles/file/wonavilemalov.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725fb675bfa---58253970001.pdf
    • http://xtra360.net/campannas/file/zowasijiferatagizug.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160853cce53d2b---vexope.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc1c30409d---gifepidedenunik.pdf
    • http://fd-health.com/upload/ckeditor/files/kibezilivom.pdf
    • http://vizesblokk.hu/files/file/46076996959.pdf
    • https://fertilizerproductionprocess.com/d/files/lesidesuterojer.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=most+powerful+love+affirmations
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001122b.bin
d9d0de30e93b43213f84267fe1c8d9d44f6e62af67d8869a7d72b4f75527f561
pdf-font-stream PDF embedded font (sfnt) at offset 0x1122B 17696 bytes
font_01_sfnt_off00014099.bin
c60af58f224b6801b9d73a3940e9f5a24b4de33140a6cd1d2a572006ca97b54b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14099 10764 bytes
font_02_sfnt_off00015974.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15974 16792 bytes