PDF malware analysis — malicious · 62e5db83c33a25dc

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 11:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: a7ca639d88330e1e91036420019e26a8 SHA-1: f398cc1d3a85a1bfc55c972e79219f43a5e39312 SHA-256: 62e5db83c33a25dc7e8e4428f33ea28df2882e7e437407344a83b1c27e5cd191

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload via the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://smidgel.ru/uplcv?utm_term=android+rom+manager+for+pc PDF link annotation
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614091214bf06---15478058933.pdfIn PDF document text
- http://whuntex.ru/userfiles/file/kegifuradekifinubeg.pdfIn PDF document text
- https://mldom.xyz/web/img/podborky/files/rewepanogojad.pdfIn PDF document text
- https://srilangkapools.com/contents/files/barepikiw.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139e560e1d52---78421873186.pdfIn PDF document text
- https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/52868674359.pdfIn PDF document text
- http://unionnutritech.com/upload/files/ribarigolu.pdfIn PDF document text
- http://xn--z92bzy85x.com/userData/board/file/75885475574.pdfIn PDF document text
- http://prosquash.by/data/1966384613.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/57597295189.pdfIn PDF document text
- https://terlickodds.cz/www/www/fckphotos/file/3773832040.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/videkesemamudonerazaro.pdfIn PDF document text
- https://efsanepin.com/calisma2/files/uploads/34480907987.pdfIn PDF document text
- https://giridhareye.org/ckfinder/userfiles/files/luseropadaga.pdfIn PDF document text
- https://pbpkrosno.com/fckfile/wedodelenexu.pdfIn PDF document text
- https://actaviaserica.org/board/file/files/89618606765.pdfIn PDF document text
- http://ityab.com/cache/fck_files/file/jigubow.pdfIn PDF document text
- http://eaas-journal.org/survey/userfiles/files/26540587973.pdfIn PDF document text
- http://media-production.net/admin/ckfinder/userfiles/files/litado.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/gegedopirilu.pdfIn PDF document text
- https://okna-kursk.ru/page_edit/_samples/userfiles/files/75031799104.pdfIn PDF document text
- http://csc020.com/userfiles/file/20210903184745_adafrl.pdfIn PDF document text
- https://duel.pl/userfiles/file/kudebi.pdfIn PDF document text
- http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/vobifafodawidaza.pdfIn PDF document text
- http://zsdbiopharm.com/upload/files/75124401307.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d4bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4BD	10632 bytes
SHA-256: `0013abda06f0f58d690598baa1f821d9c9545518d502a659727a7ac446694f44`
`font_01_sfnt_off0000ecc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECC7	17008 bytes
SHA-256: `8a863bcb2a4a0575fb2f4f5d72497ae193a61ab02d18f4311d9739f8e2f63011`
`font_02_sfnt_off00011906.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11906	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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