PDF malware analysis — malicious · cca3e4e64ed45d48

MALICIOUS

PDF

83.3 KB Created: 2021-09-24 06:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 421c702795665b3a0bf5f80d8aeeafa8 SHA-1: 92e5ad28c6d9102ac692daefb18d3ce829e85cda SHA-256: cca3e4e64ed45d48c87fcb7d5de65dd7dcb4f2585bd7314a36d08af2d156ee09

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The 'SE_URGENCY_LURE' heuristic further supports a phishing pretext, though the specific content is obfuscated.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://chcial.ru/uplcv?utm_term=who+see+your+profile+on+instagram PDF link annotation
- http://seychelles-resort.com/images/blog/file/90370684746.pdfIn PDF document text
- http://irvinenott.co.uk/ckfinder/userfiles/files/96576076632.pdfIn PDF document text
- https://investkwik.com/userfiles/file/33238695423.pdfIn PDF document text
- http://foodzipo.com/uploads/userfiles/files/vekovif.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161381c0c848ab---93781566313.pdfIn PDF document text
- http://hwayinn.com/image/files/20210905_024629.pdfIn PDF document text
- https://autosaloncenter.com/uploads/file/xefagewala.pdfIn PDF document text
- http://vincitydata.com/uploads/ckfinder/files/tegubevifezekuranapumis.pdfIn PDF document text
- http://www.greddy.com/admin/common/ckfinder/userfiles/File/97921399159.pdfIn PDF document text
- http://rowadhr.com/app/webroot/upload/files/46474209093.pdfIn PDF document text
- http://rszm88.com/upfolder/e/files/20210911034858.pdfIn PDF document text
- http://tubemakingmachine.com/uploadfile/files/jotob.pdfIn PDF document text
- http://elskenecologie.nl/files/67393400812.pdfIn PDF document text
- http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/3605964513.pdfIn PDF document text
- http://www.puhito.hu/uploads/voduzunifusibupepelolesi.pdfIn PDF document text
- http://bakefruit.com/uploads/files/202109232250294144.pdfIn PDF document text
- https://griby.biz/ckfinder/userfiles/files/dokuzukiradevevamojora.pdfIn PDF document text
- http://www.smartusb.info/images/library/File/tolibafazikem.pdfIn PDF document text
- https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/fejojak.pdfIn PDF document text
- http://decom.pro/admin/ckfinder/userfiles/files/44334804870.pdfIn PDF document text
- https://actorconseil.com/files/file/kevilu.pdfIn PDF document text
- https://hurghadalife.net/userfiles/files/kopesuzotewamoturub.pdfIn PDF document text
- http://jinruily.com/UploadFile/file/20210902044701096.pdfIn PDF document text
- https://www.ftha.org/admin/ckfinder/userfiles/files/kisanujufafeverimubide.pdfIn PDF document text
- https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/wafanavelajidotipimo.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_off0000e067.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE067	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f87e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF87E	11012 bytes
SHA-256: `0cbf17b4d33b2ff92d68f8ef75bb241c078ae42c6b486b0188d091e59360c559`
`font_02_sfnt_off000111ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111EE	17780 bytes
SHA-256: `241dac6c2bf20b6132828090efd006e65a3e75c29c7fef97d820f22e4b69c117`

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