PDF malware analysis — malicious · f55fcecec738537a

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 04:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: b32f0d45d4f820da2065779d09e25b9c SHA-1: 404c2c79f3f10e67286c52115de353f1bb3a632e SHA-256: f55fcecec738537a9b4868a83d3758131863a0a2c39f5618cec675473b65f375

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a network of links for SEO manipulation or to host malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130effc419e8---49110961650.pdf In PDF document text
- http://poultech.net/d/files/33083695204.pdfIn PDF document text
- http://dayou.tw/uploadpic/files/202109120024176499.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/junugazekuzorulenevat.pdfIn PDF document text
- http://ncfc.com.tr/ckfinder/userfiles/files/lujefir.pdfIn PDF document text
- http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/bajilekalozufuwewuxigas.pdfIn PDF document text
- http://pandoraecza.com/genelresimler/file/mefutifajas.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be7306851b---56914387565.pdfIn PDF document text
- http://oawebserver.com/piceditor/file/ridojutagabew.pdfIn PDF document text
- https://tarsiman.ee/files/file/gebudajozilu.pdfIn PDF document text
- https://inwestorfinanse.pl/userfiles/file/4589727695.pdfIn PDF document text
- http://jj-metals.com/userfiles/file/2021090202565373499.pdfIn PDF document text
- https://venus-forever.com/image/files/loputavofidetesudifemise.pdfIn PDF document text
- http://vikingpaint.com/user_file/file/68851659576.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/95336487653.pdfIn PDF document text
- https://kanat.com/upload/ckfinder/files/sevanumojijukisidikimi.pdfIn PDF document text
- https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/wokomosegatibirodafam.pdfIn PDF document text
- http://labonscafe.com/userfiles/59069907593.pdfIn PDF document text
- http://falconartistmanagement.com/ckfinder/userfiles/files/21230365250.pdfIn PDF document text
- http://ddaengshop.com/ckupload/files/fefivuxaresuka.pdfIn PDF document text
- http://hondasushi.com/uploads/files/mesumexavijogukidasokumiw.pdfIn PDF document text
- http://noithatlekhanh.com/Images_upload/files/19968563997.pdfIn PDF document text
- https://irastuff.com/admin/ckfinder/uploads/files/xibimabulim.pdfIn PDF document text
- https://majubesar.net/contents/files/zezaxelega.pdfIn PDF document text
- https://rajatotogroup4.com/contents/files/xodozikipizibofofalaka.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+delete+saved+places+in+google+maps+androidPDF 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_off0000d932.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD932	18264 bytes
SHA-256: `bfb58edfa1861d65d90c796ee16edc4f5cff645b9b3a58500c6cfe7389e1671c`
`font_01_sfnt_off0001070d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1070D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011f24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F24	11000 bytes
SHA-256: `66412da277aa650491ae5768900ea3496ebf12ab1f6178ba718e073d9cfbf283`

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