Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ca9483eebab04b…

MALICIOUS

PDF

77.3 KB Created: 2021-07-07 00:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a53276e815dd49db168ebfced9312e7 SHA-1: 92937fe9d285096a7157811be1033d5405ac1481 SHA-256: e5ca9483eebab04b5cc48472d5d82ca7896f6633841a82c1cfa71fcf94452867
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://sspvjd.com/FileData/ckfinder/files/20210706_01302B93B56A9805.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/42a9a44a55df8b261c80d744b46dc7c7/lubavapufewijifiwunet.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/3f032a334e3eb4cdca3a618c3b5c97f0/22528308562.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad35d1c4957---16087186154.pdf
    • https://emmaushuis.org/pages/taboxiwokovatewod.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a487131d0---kebomawozepepesuzufoma.pdf
    • https://nnt52.ru/userfiles/file/jevij.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6ca3a219e---manebariwuxokedinizopud.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/27b5f203c5927ea5eb05f60342fb281c/niwukenaw.pdf
    • http://angarakshaksecurity.com/userfiles/file/75981406708.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/28148651908.pdf
    • http://szrealty.net/uploadpic/2021-5/file/2021050816090873499.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab761ccfc8a---jidazusemuzebuluseve.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d25d21ec1---99603218373.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608999c4bcb0a---95171863129.pdf
    • http://abpaluso.com/upload/file/64589265353.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094a36e380e3---xipenubutixatutifojaxu.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/sakebotaludabow.pdf
    • http://thesetnews.com/images/fckeditor/file/15353948664.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f93fac25eb---72048020801.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc311e9ab---42726087562.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45b36d6e9---malobitixagiron.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e4628d3ef---3719511695.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15ac58efff---wufilax.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=general+iq+questions+and+answers
    • 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_off0000cccf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 16792 bytes
font_01_sfnt_off0000e4e1.bin
b9b0f0b66cf6ae29e5d531b8b42246b9ef86d69e3eb3b3fef4be39c1e6852191
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 17552 bytes
font_02_sfnt_off000110e4.bin
7df98086483959eb77a92f2561f3029f72fa37e65efc23d2e17da8060988f950
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 10612 bytes