Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8aca5470957019…

MALICIOUS

PDF

107.2 KB Created: 2021-06-28 20:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 819b520f62556dda79f38222989ba4b3 SHA-1: 2d48f56b43a89ebda0c0ca36347731dc4b44ed00 SHA-256: 1d8aca5470957019c08def2d05486c6b442483216df1743c4f2af797609cbf85
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised websites hosting other PDF files, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a multi-stage attack where this PDF serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/80bcb5a9f96d1e33ddfa7f3f9a9a8da3/vugibapajur.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nv2p8o5414d8sn4oca8n6judo4/roloxowosewolaw.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/24f3935345fdd1312e80647b843f058f/fasegig.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160782bdccbb42---30104970211.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/3fuhdjmiglt60j81aommltjpg6/78019531176.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbe7b8be35---46963526821.pdf
    • http://honghuibio.com/d/files/sevumovofadas.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973274d31bc---mazogum.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e6f01e31---38645855546.pdf
    • http://nova-auto.com/upload/lunokomasuwovazirujezag.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729c99a9bbc---59638400319.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7748b2e11dc66f52d0115addb5ab99ff/92993114514.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf84ce40c90---39244486254.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/66325766519.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/27337475632.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/137e9b2fbbfb2d2b4192b5bf543ea05d/varusuvikidowij.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/31ii20i7tl777gc6ja1u5hf9ql/xuninopasubokemow.pdf
    • http://sbs-group.co/userfiles/files/2636269813.pdf
    • http://chalappuram.com/userfiles/file/1746966067.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/spqnm0lu1tua6e9a70bbf01ct7/mulowizenujegege.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fc20dd1162b6a56ed4da157558a97ba2/lemebunivu.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/68f885c7800449d67d39d1a1846e4603/91250145216.pdf
    • http://www.aqsclimited.com/EditorImages/file/vozedosuxege.pdf
    • https://stijsr.com/userfiles/file/11622643492.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+1000+free+robux
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001288a.bin
335ae7d927386826c4d785e3966dbe18635ed2a575de8bcb514813205c37287b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1288A 18760 bytes
font_01_sfnt_off00015956.bin
72eb9f519ff6411885f1677b0d43ce6c6997fe2045027aad879bf698c67126f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15956 16240 bytes
font_02_sfnt_off00016f23.bin
9043f159653d3d2456792626b2baf6b694fdbde0ee5c8dc08573eea3a874f2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F23 10408 bytes
font_03_sfnt_off000186f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186F0 16792 bytes

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