PDF malware analysis — malicious · 0d91b083f4152a87

MALICIOUS

PDF

87.9 KB Created: 2021-09-04 02:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 74fb9c537088ba56b7c0060e82bd1276 SHA-1: 989bab60c0cf38dbe514066b928fbe95d78f7913 SHA-256: 0d91b083f4152a874d7796c6ef88e1c0b89bf21a391f1d1a96d3a39acb80dd8e

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The ML classifier strongly indicated maliciousness, and the heuristics suggest a deliberate attempt to obscure the true destination through link farms and SEO manipulation. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9764

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 http://perfekttorun.pl/pliki/fobexuzavaxofirekudimo.pdf In PDF document text
- https://rux-thai.com/ckfinder/userfiles/files/88077890292.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160995b875efb5---68401150928.pdfIn PDF document text
- http://www.parkwaytransplant.com/media_upload/upload/files/24395359368.pdfIn PDF document text
- http://yeosingol.com/FileData/ckfinder/files/20210706_67243DA1CD12414B.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d24c11fcd7---gadigujubakega.pdfIn PDF document text
- https://vinniescustoms.com/userfiles/files/potuxexafamijagone.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/56483524302b92f0017029adc8d66e60/tifegujonowixejazoz.pdfIn PDF document text
- https://betenenergy.com/sites/default/files/file/nijedunilusuvatufoxot.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160843a7399e19---75139802165.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e3552197---14130964318.pdfIn PDF document text
- https://leavingcare3plus.ch/userfiles/files/pixubogevepo.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16093a0137398f---28831174817.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/matofuloresaserowik.pdfIn PDF document text
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f82e45c4e509b5f19946b770a6c368d6/vutedo.pdfIn PDF document text
- http://bradzo-ep.com/uploads/files/gofomijigepovizabujowotin.pdfIn PDF document text
- https://lawyerupsmart.com/tempimg/file/52837688729.pdfIn PDF document text
- http://kirilmazbardak.com/userfiles/file/kesimixadabixaburi.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607076a8df7e2---45080673629.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b458aa92ac5---majudigedelesavugurujux.pdfIn PDF document text
- http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/37799509919.pdfIn PDF document text
- https://cuichi177.com/uploads//files/202108030500416677.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/64mb2l2lj82fjgnba9t51q9rb5/jutokubatowi.pdfIn PDF document text
- http://pelesiuvalymas.lt/i/File/62925221101.pdfIn PDF document text
- http://brilliantsolarpaneling.com/userfiles/file/bufazoxaxu.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e2064bca0---29503638891.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=spinal+fusion+exercises+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9F1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f202.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF202	18200 bytes
SHA-256: `6068ce2e51f1673128d8a98db1c8e7b82cc75dd033a3858cb07b0c41b92abe14`
`font_02_sfnt_off00010ef8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EF8	16132 bytes
SHA-256: `2f7b7cdb81d5e93f62fcf3bd699bbe6314c2bb348739b09694b8bf3b3c040bd5`
`font_03_sfnt_off00013837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13837	10792 bytes
SHA-256: `d38c7e66b9ea58ec8bda2caf7ad0bccd76d04f5c07fe6ba568fd06af17d5dcb1`

Open this report in the interactive analyzer, or submit your own file for analysis.