Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e32adf047c7b63c…

MALICIOUS

PDF

85.5 KB Created: 2021-08-14 14:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b56eaa5dc063e46fa848ec61d04b37f SHA-1: 0241d067164eb6d8573446c033e3bd32b2d500de SHA-256: 4e32adf047c7b63c9f8ad7365e8f72c2ed395e24ab0ca760c8942eaec678c37d
116 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates a cloud file-sharing service, likely to lure the user into downloading and opening it. The document contains a link farm pointing to numerous disposable domains, many of which are hosted on compromised WordPress sites. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://accomplishtheimpossible.com/userfiles_ati/file/peludesamuzudufisitajax.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c628a43194---xolofavevupavipelatavif.pdf
    • http://scarpatti.com/files/88204052736.pdf
    • https://prestinireedcorp.com/userfiles/files/gijunilonuvizavovi.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d1e49ec3a6901f5aa94285e2c40444c9/83642092631.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6aacd2f1---soxaponumobumiris.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8934518862---kadabozolabatixuwev.pdf
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/15853966554.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/sivowepaxarevegoraranake.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/06682241a8551c36c079b65126f99b1e/rigozeb.pdf
    • https://lexcyberia.com/userfiles/files/jexekaku.pdf
    • http://adabaskimerkezi.com/upload/file/rolulidabutoforur.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/fff3798419b7281e4db58e684f25a9a9/kuvifepeletewuzaviregutap.pdf
    • https://nexusmediation.nl/files/14445799375.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f69dd97be---95622185728.pdf
    • http://crystaltrade.hu/data/file/39240296731.pdf
    • https://bistakalikotenetwork.com/userfiles/file/40504868362.pdf
    • https://cbconsulting112.ca/userfiles/files/xurupevudov.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/55b94f258d80edb73cfba73a81bb54ef/vuzarit.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb9c5e688---39215415082.pdf
    • https://homestayhoian.vn/uploads/image/files/16543571893.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc39220f0c---12224910636.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+open+ipynb+files+in+spyder
    • 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_off0000e9e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 16792 bytes
font_01_sfnt_off000101fd.bin
0aa5bed135f43b8e04a4b1780a2300c50f7699abfade8f1a8c346d15f95b6f1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 10660 bytes
font_02_sfnt_off00011a4e.bin
4ff6e9ac427ee68ba0ce2342e9f3131ddfb3a474bf0c645c6aa214c97d2e03df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4E 18096 bytes