Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eabfc4994da861f…

MALICIOUS

PDF

95.7 KB Created: 2021-06-27 15:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a48fa042e02c7a3881584bb34bf37bad SHA-1: a92e1e36704e97d57c937609bf31ac3485dff5b6 SHA-256: 8eabfc4994da861f3823e4cbc3a98a92a4b1fc05ceceb094e217cc57bcf34ec4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious redirection. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', and the ML classifier also flagged it as malicious. The presence of numerous URLs suggests an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kingtonkatsu.com/uploads/files/zarisegufepegewagefinuje.pdf
    • https://mmagame.com/userfiles/file/vazana.pdf
    • http://softwarefactory.nl/images/file/butavopasefija.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f180731dfa---jujixenuzixivudena.pdf
    • https://alihuata.com/userfiles/file/xovegolufobewigakijatola.pdf
    • http://esthebel.de/userfiles/file/wirufumepamagimujiti.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f69c0ee17b---xogoteduberepeluvixenoxiz.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6g2mpndj4o7085mr7vaoo00ts/67630703772.pdf
    • http://freeski.hu/freeski/file/73203192753.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/vmuqofhlrq25hu0vir7scvjdh0/zubazinazafujujonuzusu.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160732da25c53b---96920492755.pdf
    • https://efnnma.org/files/file/6603856024.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e65dbb928b---23936554324.pdf
    • http://diagnosticaedilizia.com/userfiles/files/molobenetagilakof.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ra5sn7tp8fsbpttfuvr5psbv94/mimixabosed.pdf
    • http://valeneighbors.com/userimages/85024477368.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e60e584d2a---pujajariloxitodojuga.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/1a362e4578017236a29a504af5255eb2/jemaxag.pdf
    • http://ainut.fi/userfiles/file/7754039565.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/26603a153cc739f47fabae0a59c2376b/256345568.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3d0891c51---zufeko.pdf
    • http://indel.sk/userfiles/file/93694459847.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=native+american+sites+in+kentucky
    • 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_off0001138c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1138C 16792 bytes
font_01_sfnt_off00012ba3.bin
7ae2f6facacedd62d711faca260da5f78465d8f58f0ab8b332221e94b74cc5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA3 10576 bytes
font_02_sfnt_off000143ce.bin
fd7b6b5133c37e79676d310d3585e9e92e8f867e5e5279e4762ee10c4f2f61b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x143CE 16948 bytes