PDF malware analysis — malicious · 5ee12c6fc380c629

MALICIOUS

PDF

90.9 KB Created: 2021-07-19 14:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 547095f0320fd926259f9b51372619f5 SHA-1: 1bdbc36787a5b4c1213572a1cb6dd7d0b4e13b55 SHA-256: 5ee12c6fc380c62950f0693ef3555a71072b196c2e11ed7f4d3983ff6f82a698

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. The ML classifier strongly indicated maliciousness, and the heuristics identified a high number of distinct hosts and links, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body was unreadable, limiting the analysis to the URL structure and heuristic findings.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 5

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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbddf86e22---duseworizapet.pdf In PDF document text
- http://ouhkpthaa.org/userfiles/44078540186.pdfIn PDF document text
- http://ok-poland.com/userfiles/file/9096128111.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3619820d---19020734700.pdfIn PDF document text
- http://dedanskecasinoer.dk/userfiles/file/fanafijulipepe.pdfIn PDF document text
- http://shengnabei.com/uploadfile/file///2021061306305678.pdfIn PDF document text
- http://beulahcooleycollection.com/clients/870349/File/lerutipalasubijiligiwit.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160f1fd20525b5---tivafizepeva.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c3711e253---bimat.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/2jm1pmurj76rttuk2mqt04a2dm/wegobojepipopoxo.pdfIn PDF document text
- http://dichvugiayphep.net/hinhanh_fckeditor/file/soxemamojinuteza.pdfIn PDF document text
- https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/qn5466gbvsuaoebvunkr2p7bt2/lefupezawepatokini.pdfIn PDF document text
- https://lentes123.com/aym_image/files/25201346399.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b8fc20670c9b0c5b5d733e65119d4803/ruzitefuv.pdfIn PDF document text
- https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/todarimewavirabowiradu.pdfIn PDF document text
- http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b0156727---82070651528.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/73de70b38136d95b17e99bb18614a167/tufileratixufogu.pdfIn PDF document text
- http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609227331156f---gojudogobamipariduze.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b0a6ec78515fa83b4513272add2ca402/mubikovewovu.pdfIn PDF document text
- http://prodottoitalia.eu/userfiles/files/49259276469.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609036edd164c---28553501121.pdfIn PDF document text
- http://agriturismofattorialucciano.com/ckfinder/userfiles/files/83020566620.pdfIn PDF document text
- http://marymo.ru/uploads/files/40681320881.pdfIn PDF document text
- http://eortak.com/img/fck_temp/file/39518180789.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/868825b9b6f71d4fb9a39cd3b0677ed0/latapifakilarij.pdfIn PDF document text
- http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836ddb01957---47677168895.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=assassin%27s+creed+2+puzzle+solutionsPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fcb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCB2	10800 bytes
SHA-256: `10834440e5b28d0553069f2f12e57759d8ad530192e108ae773a0e0fc895cb36`
`font_01_sfnt_off000115d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115D9	18248 bytes
SHA-256: `977b168fd88116c55b1b4b9fcf798007670b1f1ef8ce670b3120e6311396a353`
`font_02_sfnt_off000145b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145B5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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