PDF malware analysis — malicious · b0624803b19474d3

MALICIOUS

PDF

176.7 KB Created: 2021-10-09 01:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: a09d8eb5d9d2eeea566546160a093098 SHA-1: e8e7d1006a72faaba9ab5daa5ce1dda7c3a6b233 SHA-256: b0624803b19474d3c5b3fab180f3856c45c4c77753fd9ab49a245f009f73627f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs that likely serve as redirects to phishing sites or malware downloaders. The presence of external URIs and link farm characteristics further supports its role as a distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9904

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://inwebjor.ru/uplcv?utm_term=only+when+necessary PDF link annotation
- http://newabel.com/ckfinder/userfiles/files/56313741794.pdfIn PDF document text
- https://istanajp2.com/contents/files/58603673696.pdfIn PDF document text
- http://adamex.ukrkarta.ua/fckeditor/userfiles/file/roxagemodurogedefituvi.pdfIn PDF document text
- http://chixue.com/uploadfile/file/20210905012813.pdfIn PDF document text
- https://volgogradexpo.ru/ckfinder/userfiles/files/vutivuduvurugulasoluna.pdfIn PDF document text
- https://pannonfinanz.eu/editor_up/rogesoxisegefekamizalem.pdfIn PDF document text
- http://trust-law-firm.com/userfiles/file/20211002165713_1487768664.pdfIn PDF document text
- http://status.cz/UserFiles/File/nenuwugaza.pdfIn PDF document text
- https://webhosting4.net/media/file/5365003703.pdfIn PDF document text
- https://aparcaderoshaddaichile.cl/uploads/images/files/sedalosonexepumibigifab.pdfIn PDF document text
- https://trinityautorepairs.com/uploads/files/90852643667.pdfIn PDF document text
- http://aias.pnu.ac.th/ckfinder/userfiles/files/69475767912.pdfIn PDF document text
- http://honderhotel.com/UploadFiles/FCKeditor/20210926012414.pdfIn PDF document text
- https://home-consult.lu/userfiles/files/jesunizakebarowakisujeg.pdfIn PDF document text
- https://aljazeerahpetroleum.ae/userfiles/files/70210098243.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/n24c9g6i5f98f190rq83f7m52o/60408058874.pdfIn PDF document text
- https://factorysales.com/userfiles/files/jokigux.pdfIn PDF document text
- http://labotinnghia.com/img/files/nerexodagitimowa.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/82342188079.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161521821d4c2d---30031631635.pdfIn PDF document text
- http://dnt-mayak.ru/content/File/97880842360.pdfIn PDF document text
- http://addon-colsman.somantec.net/ckfinder/userfiles/files/39219985670.pdfIn PDF document text
- http://tienphat.vn/imagesflashupload/file/banutulogokodarolewel.pdfIn PDF document text
- http://xsteelstock.com/d/files/22872986890.pdfIn PDF document text
- 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_off0002304c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2304C	10240 bytes
SHA-256: `5c740d1bb7ffa0fa4ecb5da05b4658ee626d74d9540c402be8e2661c82ec5dfa`
`font_01_sfnt_off0002475d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2475D	16060 bytes
SHA-256: `64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973`
`font_02_sfnt_off00025c72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25C72	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00027484.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27484	25252 bytes
SHA-256: `b6c50f955444c41ec15ecd623df1ef325fe1ab256fa7ab915d4b2df8b0dd3c18`

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